ECO 101 Past Questions and Answers

TAKE ECO 101 PRACTICE QUIZ1. The English word "Economics" is derived from the Greek word:   A. Oikonomia   B. Ecologia   C. Politikos   D. Logos   Answer: A2. What does the Greek root of "Economics" literally mean?   A. Study of wealth   B. Management of the state   C. Household management   D. Distribution of resources   Answer: C3. Which ancient philosopher was among the first to describe economics as a science of household management?   A. Plato   B. Socrates   C. Aristotle   D. Homer   Answer: C4. Who is widely regarded as the "Father of Economics"?   A. John Maynard Keynes   B. Alfred Marshall   C. Adam Smith   D. David Ricardo   Answer: C5. Adam Smith described economics as the science of:   A. Human welfare   B. Wealth   C. Choice   D. Scarcity   Answer: B6. Adam Smith's major work focused on the nature and causes of:   A. Poverty of nations   B. Wealth of nations   C. Trade of nations   D. Labor of nations   Answer: B7. Alfred Marshall defined economics as:   A. The science of wealth production   B. A study of mankind in the ordinary business of life   C. The allocation of scarce resources   D. The management of government expenditure   Answer: B8. The modern definition of economics emphasizes which of the following?   A. Production of goods only   B. Wealth accumulation   C. Use of scarce resources to satisfy unlimited wants   D. Distribution of wealth among the rich   Answer: C9. The fundamental economic problem facing every society is:   A. Unemployment   B. Inflation   C. Scarcity   D. Poverty   Answer: C10. Human wants are described in economics as:    A. Limited    B. Finite    C. Unlimited    D. Constant    Answer: C11. Which of the following best describes "scarcity" in economics?    A. Goods and services being free    B. Resources being insufficient relative to wants    C. Goods being unavailable in the market    D. People having too much money    Answer: B12. A scale of preference is defined as:    A. A list of all goods available in the market    B. A ranked list of needs arranged in order of importance    C. The government's list of economic priorities    D. A business plan for production    Answer: B13. The scale of preference is necessitated by:    A. Inflation    B. Government policy    C. Scarcity    D. Trade deficit    Answer: C14. In the scale of preference, the most pressing need is placed:    A. At the bottom    B. In the middle    C. At the top    D. In random order    Answer: C15. Choice in economics arises directly because of:    A. Abundance of resources    B. Scarcity of resources    C. Government intervention    D. Market competition    Answer: B16. Economics is classified as a social science because it:    A. Deals with natural phenomena only    B. Employs systematic observation and analysis of human behavior    C. Studies only financial matters    D. Is concerned only with government decisions    Answer: B17. Which of the following is NOT a reason for studying economics?    A. Personal and household decision-making    B. Understanding international relations    C. Learning to play musical instruments    D. Economic planning by governments    Answer: C18. Workers and trade unions use economics to strengthen their:    A. Political influence    B. Bargaining capacity on wages and conditions    C. Military power    D. Religious activities    Answer: B19. Governments rely on economic principles mainly to:    A. Win elections    B. Plan national budgets and allocate resources    C. Train the military    D. Control the media    Answer: B20. The example of a person with ₦100 who wants a notebook (₦100) and a football match (₦80 + ₦20 transport) illustrates:    A. Investment decision    B. How scarcity forces choice    C. Government budgeting    D. International trade    Answer: B21. Which of the following is a basic need that societies always desire?    A. Private planes    B. Luxury cars    C. Food, clothing, and shelter    D. Gold trinkets    Answer: C22. What does "insatiable wants" mean in the context of economics?    A. Wants that can be fully satisfied    B. Wants that are never completely satisfied    C. Wants that are satisfied by the government    D. Wants that decrease over time    Answer: B23. The origin of the word "economist" from Greek means:    A. One who trades goods    B. One who manages a household    C. One who studies nature    D. One who rules a state    Answer: B24. The similarity between a household and an economy is that both:    A. Have the same size    B. Face the same challenge of managing scarce resources    C. Are managed by the government    D. Produce the same goods    Answer: B25. Which of the following is an example of scarcity forcing national decision-making?    A. A country choosing between building hospitals or roads with limited funds    B. A country printing more money freely    C. A country importing all its needs without restrictions    D. A country giving away resources for free    Answer: A====================================================================SECTION B: THE TEN PRINCIPLES OF ECONOMICS====================================================================26. Principle Two in economics states that the cost of something is:    A. The price paid at the market    B. What you give up to get what you want    C. The government-imposed tax    D. The production cost of the manufacturer    Answer: B27. The concept that captures "what you give up to get something" is called:    A. Sunk cost    B. Fixed cost    C. Opportunity cost    D. Variable cost    Answer: C28. When a student attends university full-time, a major cost NOT typically accounted for is:    A. Tuition fees    B. Cost of books    C. Room and boarding fees    D. Forgone wages (time)    Answer: D29. According to Principle Two, the single greatest cost of attending university for a student is:    A. Tuition fees    B. Transportation costs    C. The wages given up (opportunity cost of time)    D. Cost of textbooks    Answer: C30. Principle Three states that rational people think at the:    A. Global level    B. Margin    C. National level    D. Macro level    Answer: B31. "Marginal changes" in economics refer to:    A. Large structural adjustments in the economy    B. Small incremental adjustments to an existing plan    C. Government policies on taxation    D. Changes in international trade agreements    Answer: B32. A university graduate deciding whether to pursue a Master's degree is engaging in which type of thinking?    A. Irrational thinking    B. Global thinking    C. Marginal thinking    D. Macro thinking    Answer: C33. When evaluating the extra year for a Master's degree, the marginal cost would include:    A. Previous undergraduate tuition already paid    B. Forgone wages and additional tuition fees    C. Childhood education costs    D. Future retirement benefits    Answer: B34. A marginal benefit of pursuing a Master's degree includes:    A. Reduction in undergraduate debts    B. Access to higher positions and a better standard of living    C. Free housing from the government    D. Automatic promotion at current job    Answer: B35. Principle Four states that people respond to:    A. Traditions    B. Incentives    C. Peer pressure only    D. Government orders only    Answer: B36. An incentive in economics is best described as:    A. A form of punishment    B. Something that motivates people to act in a particular way    C. A tax imposed by the government    D. A law enacted by parliament    Answer: B37. When the price of a product increases, producers typically:    A. Reduce their supply    B. Maintain the same supply    C. Are encouraged to supply more due to higher profits    D. Exit the market immediately    Answer: C38. When the price of a product increases, consumers typically:    A. Demand more of the product    B. Reduce their demand because it has become more expensive    C. Ignore the price change    D. Demand the same quantity    Answer: B39. Which of the following is an example of a government incentive?    A. Consumer preferences    B. Personal traditions    C. Taxes, subsidies, and fines    D. Social media trends    Answer: C40. A subsidy given to farmers by the government is an example of:    A. A disincentive    B. A penalty    C. A positive incentive to encourage production    D. A trade barrier    Answer: C41. According to Principle Four, when a penalty is imposed, individuals and firms respond:    A. Positively    B. Neutrally    C. Negatively    D. Randomly    Answer: C42. Trade-offs in economics refer to:    A. Exchange of goods between countries    B. Comparing costs and benefits of alternative courses of action    C. The barter system    D. Stock market transactions    Answer: B43. The opportunity cost concept is most closely associated with which economic principle?    A. Principle One    B. Principle Three    C. Principle Two    D. Principle Five    Answer: C44. Rational people in economic decision-making are those who:    A. Act on emotions    B. Make decisions by comparing marginal costs and marginal benefits    C. Always prefer the cheapest option    D. Avoid all risks    Answer: B45. The benefits of pursuing a university education include all of the following EXCEPT:    A. Intellectual enrichment    B. Better job opportunities    C. Guaranteed government employment    D. A lifetime of improved career prospects    Answer: C====================================================================SECTION C: MICROECONOMICS====================================================================46. Microeconomics is the branch of economics concerned with:    A. The behavior of the entire national economy    B. International trade policies    C. The behavior of individual units within the broader economy    D. Government fiscal policy only    Answer: C47. Which of the following falls within the scope of microeconomics?    A. National inflation rate    B. Total government revenue    C. How wages for specific types of labor are determined    D. Overall national unemployment rate    Answer: C48. Microeconomics examines the determination of:    A. Only prices of goods    B. Prices, wages, interest, rent, and profits at the individual level    C. Only the national budget    D. Only exchange rates    Answer: B49. The analysis of resource allocation in microeconomics is studied in how many progressive stages?    A. Two    B. Three    C. Four    D. Five    Answer: B50. The first stage of microeconomic analysis involves:    A. Equilibrium of all markets simultaneously    B. Equilibrium of individual consumers and producers    C. Government policy formulation    D. International market equilibrium    Answer: B51. The second stage of microeconomic analysis involves:    A. The equilibrium of a single market    B. The national budget    C. Global trade equilibrium    D. Simultaneous equilibrium of all markets    Answer: A52. In microeconomics, all prices are considered:    A. Fixed and constant    B. Set by the government    C. Relative to one another    D. Independent of each other    Answer: C53. Welfare economics is closely connected to which microeconomic issue?    A. Price determination    B. How efficiently resources are distributed across the economy    C. Government taxation policy    D. International exchange rates    Answer: B54. Who described microeconomics as "a necessary part of one apparatus"?    A. Adam Smith    B. Alfred Marshall    C. John Maynard Keynes    D. David Ricardo    Answer: C55. Microeconomics helps us understand the working of the economy by:    A. Studying all countries simultaneously    B. Focusing on the smallest components — individual consumers, firms, and markets    C. Examining government spending only    D. Analyzing overall GDP    Answer: B56. One of the most fundamental functions of microeconomics is:    A. Determining the national minimum wage    B. Explaining how prices are determined through demand and supply    C. Setting import tariffs    D. Planning government budgets    Answer: B57. The rate of exchange of a currency in a free market is determined by:    A. Government decree    B. The central bank alone    C. The demand for and supply of foreign exchange    D. International treaties    Answer: C58. "Pareto-optimal" conditions in welfare economics refer to:    A. Conditions of perfect inequality    B. Conditions of efficiency with elimination of all forms of inefficiency    C. Maximum poverty reduction    D. Equal distribution of wealth    Answer: B59. According to Lerner's observation in microeconomics, the ideal conditions of efficiency are achievable under:    A. Monopoly    B. Oligopoly    C. Perfect competition    D. Government control    Answer: C60. Microeconomic theory provides a framework for making:    A. Certain and absolute predictions about the future    B. Conditional predictions based on given assumptions    C. Random guesses about market behavior    D. Universal laws that never change    Answer: B61. Economic models in microeconomics serve as:    A. Exact replicas of reality    B. Simplified representations of reality for analyzing complex interactions    C. Government blueprints for policy    D. Mathematical proofs of all economic relationships    Answer: B62. The balance of payments disequilibrium can be explained using:    A. Macroeconomic tools only    B. Microeconomic tools    C. Political science theories    D. Historical analysis only    Answer: B63. Microeconomics also helps in examining conditions necessary for:    A. Military spending    B. Economic welfare    C. Electoral voting    D. Religious governance    Answer: B64. The maximization of social welfare under microeconomics is achievable only under:    A. Monopoly market conditions    B. Government-controlled prices    C. Perfect competition    D. Oligopolistic conditions    Answer: C65. Which of the following is NOT a function of microeconomics?    A. Determination of prices    B. Basis for prediction    C. Construction and use of models    D. Determination of national income as a whole    Answer: D====================================================================SECTION D: BASIC TOOLS OF ECONOMIC ANALYSIS====================================================================66. Economists use which two primary instruments to analyze economic issues?    A. Laws and regulations    B. Models and data    C. Surveys and interviews    D. Newspapers and textbooks    Answer: B67. A model in economics is best described as:    A. A perfect replica of economic reality    B. A deliberate simplification of reality designed to highlight important relationships    C. A government policy document    D. A historical account of economic events    Answer: B68. Data in economics consists of:    A. Government budgets only    B. Facts or information about given variables, usually obtained through observation    C. Theoretical assumptions    D. Random guesses about the economy    Answer: B69. Which of the following are basic tools of economic analysis?    A. Mathematical equations, tables, graphs, diagrams, and charts    B. Laws, regulations, and court orders    C. News articles and social media posts    D. Religious texts and cultural norms    Answer: A70. Tables in economic analysis are:    A. Three-dimensional representations of data    B. Systematic arrangements of facts and figures in rows and columns    C. Computer programs for economic simulation    D. Informal collections of economic data    Answer: B71. The title of a table in economic analysis should be:    A. Long and detailed with technical jargon    B. Brief and self-explanatory, placed above the table    C. Placed below the table    D. Optional and not required    Answer: B72. The "caption" or "box head" in a table refers to:    A. The source of the data    B. Classification of items along the columns    C. The title of the table    D. The row classification    Answer: B73. The "stub" in a table provides classification along the:    A. Columns    B. Rows    C. Diagonal    D. Source section    Answer: B74. The "source" in a table indicates:    A. The date the table was created    B. Where the data was obtained    C. The author's name    D. The purpose of the table    Answer: B75. A mathematical function in economics shows:    A. The history of a country's economy    B. The relationship between variables    C. Government fiscal policy    D. Population growth patterns    Answer: B76. The expression Qd = f(P) reads as:    A. Quantity demanded equals price    B. Quantity demanded is a function of price    C. Quantity demanded is independent of price    D. Price is a function of quantity    Answer: B77. In the equation Qd = f(P), "Qd" represents:    A. Quality demanded    B. Quantity demanded    C. Quantity distributed    D. Quality distributed    Answer: B78. In the equation Qd = f(P), "f" denotes:    A. Final demand    B. Fiscal policy    C. The functional relationship    D. Fixed cost    Answer: C79. Given the equation Q = 48 – 7P, if P = 5, what is the value of Q?    A. 11    B. 12    C. 13    D. 14    Answer: C80. Using Q = 48 – 7P, if P = 4, what is Q?    A. 18    B. 20    C. 22    D. 24    Answer: B81. Using Q = 48 – 7P, if P = 6, what is Q?    A. 5    B. 6    C. 7    D. 8    Answer: B82. Measures of central tendency are also referred to as:    A. Measures of dispersion    B. Measures of location    C. Measures of distribution    D. Measures of variation    Answer: B83. Measures of central tendency summarize a dataset with:    A. Multiple values    B. A single representative value    C. A range of values    D. A graphical representation    Answer: B84. Which of the following is a measure of central tendency?    A. Standard deviation    B. Range    C. Mean    D. Variance    Answer: C85. Which of the following is also a measure of central tendency?    A. Interquartile range    B. Mode    C. Standard deviation    D. Coefficient of variation    Answer: B86. Graphs in economic analysis are useful because they:    A. Replace the need for mathematical equations    B. Allow us to visualize relationships between economic variables    C. Eliminate the need for data collection    D. Are only used by advanced economists    Answer: B87. In which form can both models and data be presented?    A. Only in verbal form    B. Only in graphical form    C. In mathematical or statistical form    D. Only as government reports    Answer: C88. Charts and diagrams in economics are primarily used to:    A. Replace tables    B. Present economic relationships visually    C. Store data permanently    D. Make legal arguments    Answer: B89. Which of the following best describes the role of data in economic analysis?    A. It provides theoretical assumptions for models    B. It consists of facts obtained through observation used alongside models    C. It replaces the need for economic models    D. It is only useful in macroeconomics    Answer: B90. The purpose of tables in economic analysis is to make it easy to:    A. Store large amounts of raw data    B. Compare data and identify patterns at a glance    C. Replace graphical tools    D. Create government policies    Answer: B====================================================================SECTION E: ELASTICITY OF DEMAND====================================================================91. Elasticity in economics measures:    A. The level of government spending    B. The degree to which quantity demanded responds to a change in price or other variables    C. The speed of economic growth    D. The strength of the currency    Answer: B92. Price elasticity of demand is defined as:    A. The change in price divided by the change in supply    B. The percentage change in quantity demanded divided by the percentage change in price    C. The total revenue earned by producers    D. The change in income divided by the change in price    Answer: B93. Along a straight-line demand curve, which of the following remains constant?    A. Elasticity    B. The slope (ΔP/Δq)    C. The quantity demanded    D. The price level    Answer: B94. Even though the slope is constant along a straight-line demand curve, elasticity:    A. Remains constant throughout    B. Is always equal to one    C. Varies from point to point    D. Is always greater than one    Answer: C95. At the price axis intercept (Point A) of a straight-line demand curve, price elasticity is:    A. Zero    B. One    C. Less than one    D. Infinity (∞)    Answer: D96. At the quantity axis intercept (Point E) of a straight-line demand curve, price elasticity is:    A. Infinity    B. Zero    C. One    D. Greater than one    Answer: B97. At the midpoint (Point C) of a straight-line demand curve, price elasticity equals:    A. Zero    B. Infinity    C. One    D. Greater than one    Answer: C98. As we move from Point A toward Point E along a demand curve, price elasticity:    A. Increases from zero to infinity    B. Remains constant    C. Falls progressively from infinity to zero    D. First increases then decreases    Answer: C99. At Point B on a straight-line demand curve (above the midpoint), price elasticity is:    A. Equal to one    B. Greater than one    C. Less than one    D. Equal to zero    Answer: B100. At Point D on a straight-line demand curve (below the midpoint), price elasticity is:     A. Equal to one     B. Greater than one     C. Less than one     D. Equal to infinity     Answer: C101. Which of the following is a method for measuring elasticity of demand?     A. Price elasticity of demand only     B. Price elasticity, income elasticity, and cross-elasticity of demand     C. Supply elasticity only     D. Wage elasticity only     Answer: B102. Income elasticity of demand measures:     A. How quantity demanded responds to a change in price     B. How quantity demanded responds to a change in consumer income     C. How price responds to a change in supply     D. How wages respond to a change in employment     Answer: B103. Cross-elasticity of demand measures:     A. How the quantity demanded of one good responds to a price change of another good     B. How wages change with employment levels     C. How exchange rates respond to trade imbalances     D. How government spending affects GDP     Answer: A104. The concept of elasticity applies in macroeconomics to:     A. Individual consumer behavior only     B. Cost elasticity of output, interest elasticity of investment, and income elasticity of imports     C. Stock market analysis only     D. Government budget planning only     Answer: B105. A demand curve with elasticity greater than one is described as:     A. Inelastic     B. Unit elastic     C. Elastic     D. Perfectly inelastic     Answer: C106. A demand curve with elasticity less than one is described as:     A. Elastic     B. Unit elastic     C. Perfectly elastic     D. Inelastic     Answer: D107. When price elasticity of demand equals one, demand is said to be:     A. Elastic     B. Inelastic     C. Unit elastic     D. Perfectly elastic     Answer: C108. The formula for price elasticity of demand is:     A. % change in price ÷ % change in quantity demanded     B. % change in quantity demanded ÷ % change in price     C. Change in supply ÷ change in price     D. Change in income ÷ change in quantity     Answer: B109. The ratio ΔP/Δq along a straight-line demand curve represents:     A. Price elasticity     B. The slope of the demand curve     C. Quantity demanded     D. Consumer income     Answer: B110. The reciprocal of the slope of the demand curve (Δq/ΔP) is:     A. Price elasticity     B. Constant everywhere along a straight-line demand curve     C. Always equal to one     D. Zero at all points     Answer: B====================================================================SECTION F: MIXED TOPICS AND APPLIED QUESTIONS====================================================================111. Which of the following best defines economics in modern terms?     A. The science of making profits in business     B. The study of government policy     C. The study of how societies use scarce resources to produce and distribute goods     D. The management of personal finances     Answer: C112. The "invisible hand" concept, though not directly covered in the text, is associated with which economist?     A. Alfred Marshall     B. Adam Smith     C. John Maynard Keynes     D. David Ricardo     Answer: B113. Which of the following is NOT one of the basic wants of humans mentioned in the text?     A. Food     B. Clothing     C. Shelter     D. Education     Answer: D114. Scarcity applies to:     A. Only poor individuals     B. Only developing countries     C. Individuals, societies, and nations alike     D. Only governments     Answer: C115. The concept of opportunity cost is essential when making decisions because:     A. It shows how much profit a business makes     B. It reveals what is sacrificed when one alternative is chosen over another     C. It measures total production in an economy     D. It determines the market price of goods     Answer: B116. Which of the following represents an opportunity cost?     A. Paying tuition fees for a course     B. Buying textbooks     C. The income not earned while studying full-time     D. The cost of transportation to school     Answer: C117. The fact that individual preferences differ from person to person in the scale of preference shows that:     A. There is one universal preference ranking     B. Government should set preferences for everyone     C. Preferences are subjective and vary by individual taste and circumstance     D. Scarcity does not affect everyone equally     Answer: C118. Microeconomics differs from macroeconomics in that it focuses on:     A. The entire economy     B. National income     C. Individual units such as consumers, firms, and specific markets     D. International trade only     Answer: C119. A student choosing between studying economics and studying medicine is illustrating:     A. The concept of trade     B. The concept of trade-off and opportunity cost     C. The concept of investment     D. The concept of elasticity     Answer: B120. The practical use of economic models is that they:     A. Predict the future with absolute certainty     B. Enable analysts to study complex interactions between economic variables in a simplified way     C. Replace the need for government policies     D. Eliminate economic problems     Answer: B121. Which of the following is an example of a positive incentive?     A. A fine imposed on polluters     B. A tax increase on luxury goods     C. A subsidy provided to small-scale farmers     D. A ban on certain imports     Answer: C122. Which of the following is an example of a negative incentive?     A. A government grant for new businesses     B. A tax reduction for investors     C. A penalty imposed on tax evaders     D. A bonus for high-performing workers     Answer: C123. Which field of economics focuses on maximizing social welfare?     A. International economics     B. Development economics     C. Welfare economics     D. Public finance     Answer: C124. The concept of "Pareto optimality" means:     A. Maximum production with available resources     B. An allocation where no one can be made better off without making someone else worse off     C. Equal distribution of wealth     D. Zero unemployment in the economy     Answer: B125. In a free market, the exchange rate is determined by:     A. The government alone     B. The central bank's fixed rate     C. Demand and supply of foreign exchange     D. International organizations     Answer: C126. Which of the following is a macroeconomic application of the elasticity concept?     A. Price elasticity of a single consumer good     B. Interest elasticity of investment     C. Elasticity of a firm's demand for labor     D. Cross-price elasticity between two brands     Answer: B127. The income elasticity of import demand is a concept found in:     A. Microeconomics only     B. Macroeconomics     C. Business management     D. Political science     Answer: B128. A table used in economic analysis is effective because it:     A. Eliminates the need for mathematical analysis     B. Provides an artistic representation of data     C. Makes it easy to compare data and identify patterns at a glance     D. Is used exclusively in government reports     Answer: C129. Decisions made by governments on how to allocate limited budgets best illustrate:     A. Personal financial management     B. Business investment decisions     C. Economic planning under scarcity     D. International trade negotiations     Answer: C130. Which of the following statements is TRUE about price elasticity along a linear demand curve?     A. Elasticity is constant throughout the curve     B. Elasticity increases as we move down the curve     C. Elasticity decreases as we move from the price axis to the quantity axis     D. Elasticity is always equal to one     Answer: C====================================================================SECTION G: DEEPER CONCEPTUAL QUESTIONS====================================================================131. If a government removes a subsidy on fuel, what is the expected consumer response according to Principle Four?     A. Consumers will increase fuel consumption     B. Consumers will respond negatively and reduce fuel consumption     C. Consumers will remain unaffected     D. Consumers will import more fuel     Answer: B132. When a firm evaluates whether to hire one more worker, it is engaging in:     A. Macro-level planning     B. International trade analysis     C. Marginal analysis     D. Welfare economics     Answer: C133. The ripple effect of a price change in one market affecting other markets is a concept from:     A. Macroeconomics     B. International economics     C. Microeconomics (relative price analysis)     D. Government policy studies     Answer: C134. Which of the following best illustrates marginal thinking (Principle Three)?     A. Deciding to start a completely new business     B. Evaluating whether to produce one more unit of a good     C. Writing a national economic plan     D. Choosing between two entirely different careers     Answer: B135. The demand for scooters and how their prices are determined is a topic in:     A. Macroeconomics     B. Microeconomics     C. International economics     D. Development economics     Answer: B136. When Keynes described microeconomics as a "necessary part of one apparatus," he was acknowledging its:     A. Irrelevance in modern economics     B. Both theoretical and practical value     C. Exclusively theoretical value     D. Replacement by macroeconomics     Answer: B137. The statement "quantity demanded is a function of price" means:     A. Price depends on quantity     B. There is no relationship between price and quantity     C. Quantity demanded depends on price     D. Price is always constant     Answer: C138. Solving Q = 48 – 7P for P = 3 gives Q equal to:     A. 26     B. 27     C. 28     D. 29     Answer: B139. If Q = 48 – 7P and Q = 6, what is P?     A. 5     B. 6     C. 7     D. 8     Answer: B140. Economic welfare maximization is achieved under which market structure according to the text?     A. Monopoly     B. Duopoly     C. Perfect competition     D. Oligopoly     Answer: C141. The role of trade unions in using economics is mainly to:     A. Set government fiscal policy     B. Strengthen workers' bargaining position on wages and working conditions     C. Manage international trade agreements     D. Set interest rates for banks     Answer: B142. A household deciding how to spend its monthly income on food, rent, and education best illustrates:     A. National economic planning     B. The scarcity and choice problem at the household level     C. International commerce     D. Government fiscal policy     Answer: B143. The concept of "conditional predictions" in microeconomics means that predictions are:     A. Always accurate     B. Based on given assumptions and changes in specific variables     C. Made without any data     D. Guaranteed to come true     Answer: B144. A change in tax law can affect a business by changing:     A. The physical location of the business     B. The number of employees only     C. The cost structure and profitability of the business     D. The quality of goods produced     Answer: C145. The equilibrium of all markets simultaneously is studied in which stage of microeconomic analysis?     A. First stage     B. Second stage     C. Third stage     D. Fourth stage     Answer: C146. Economics helps people pursuing careers in international business because it provides:     A. Legal training     B. Knowledge of socio-economic events and global commerce     C. Military strategy     D. Language skills     Answer: B147. When producers increase supply due to a rise in price, they are responding to:     A. A negative incentive     B. Government regulation     C. A positive incentive (higher expected profits)     D. Consumer pressure     Answer: C148. The concept that every resource used to satisfy one need leaves another need unmet is the essence of:     A. Welfare economics     B. Economic choice     C. Monetary policy     D. Fiscal policy     Answer: B149. A "ripple effect" in economics means that:     A. One economic change in one market stays isolated to that market     B. A change in one price creates effects that touch both product and factor markets     C. Prices never change in a market economy     D. Only the government can change prices     Answer: B150. Microeconomic analysis of resource allocation concerns itself most with:     A. International monetary policy     B. Efficient allocation of resources among individual consumers and producers     C. Total national production     D. Government debt management     Answer: B====================================================================SECTION H: FURTHER PRACTICE QUESTIONS====================================================================151. In economics, "wants" refer to:     A. Only physical goods     B. Desires for goods and services by individuals and societies     C. Government expenditures     D. Only luxury items     Answer: B152. The scale of preference reflects:     A. The government's economic policy     B. A consumer's personal ranking of wants     C. The market supply schedule     D. A producer's production plan     Answer: B153. When a nation prioritizes healthcare spending over road construction in a given year, this reflects:     A. The nation's scale of preference given scarce resources     B. International trade policy     C. Monetary policy     D. Microeconomic equilibrium     Answer: A154. Economics evolved from describing only wealth production to covering:     A. Political governance     B. Human behavior and resource allocation under scarcity     C. Military strategy     D. Religious practices     Answer: B155. The definition of economics that emphasizes "mankind in the ordinary business of life" belongs to:     A. Adam Smith     B. Aristotle     C. Alfred Marshall     D. John Maynard Keynes     Answer: C156. Which of the following is a micro-level concern?     A. National unemployment rate     B. Total GDP of a country     C. Price of petrol in a specific market     D. Overall inflation in an economy     Answer: C157. Elasticity analysis is considered important in both micro and macroeconomics because:     A. It only applies to consumer goods     B. Its application extends to investment, imports, and output beyond just consumer demand     C. It replaces all other economic tools     D. It is exclusively a mathematical concept     Answer: B158. The slope of a straight-line demand curve is constant because:     A. The quantity demanded never changes     B. The ratio ΔP/Δq is constant at every point     C. The price is fixed by the government     D. Consumers always buy the same quantity     Answer: B159. At a point above the midpoint on a straight-line demand curve, demand is:     A. Unit elastic     B. Inelastic     C. Elastic (Ep > 1)     D. Perfectly inelastic     Answer: C160. At a point below the midpoint on a straight-line demand curve, demand is:     A. Elastic     B. Unit elastic     C. Perfectly elastic     D. Inelastic (Ep < 1)     Answer: D161. The study of how rent for individual entrepreneurs is determined belongs to:     A. Macroeconomics     B. International economics     C. Microeconomics     D. Development economics     Answer: C162. Which of the following tools would an economist use to show the relationship between price and quantity?     A. A government policy document     B. A demand-supply graph or diagram     C. A newspaper article     D. A historical narrative     Answer: B163. The statement "economics is the science of making choices under conditions of scarcity" captures the:     A. Macroeconomic view of economics     B. Core essence of what economics is about     C. Government budgeting process     D. International trade theory     Answer: B164. An economist uses a model to:     A. Predict with certainty what will happen in the economy     B. Organize thinking and analyze important relationships in a simplified way     C. Replace real-world data     D. Set government policies     Answer: B165. The idea that governments can use taxes and subsidies to influence behavior is an application of:     A. Principle Two     B. Principle Three     C. Principle Four (people respond to incentives)     D. Principle One     Answer: C166. Personal savings decisions by a household is best explained through:     A. Macroeconomics     B. International trade economics     C. Microeconomics / household economics     D. Monetary policy     Answer: C167. An upward-sloping supply curve reflects that:     A. As price falls, producers supply more     B. As price rises, producers are incentivized to supply more     C. Supply is not related to price     D. Only the government can change supply     Answer: B168. The concept of "margin" in marginal analysis refers to the:     A. Largest possible change in production     B. Next additional unit of activity or output     C. Historical average of economic activity     D. Minimum level of economic activity     Answer: B169. Comparing marginal benefits and marginal costs allows decision-makers to determine:     A. Total national output     B. Whether an additional action is worthwhile     C. How to print more money     D. The government's annual budget     Answer: B170. Which of the following best describes "trade-off" in economics?     A. Exchange of goods between countries     B. The situation where choosing one option means giving up another     C. Government-to-government economic negotiations     D. The balance between imports and exports     Answer: B====================================================================SECTION I: FINAL PRACTICE SET====================================================================171. The field of study concerned with determining how interest on capital assets is set is:     A. Macroeconomics     B. International economics     C. Microeconomics     D. Public finance     Answer: C172. What does the "stub" in a data table indicate?     A. Source of data     B. Title of the table     C. Classification along the rows     D. Classification along the columns     Answer: C173. Which of the following statements about human wants is CORRECT?     A. Human wants are limited and can be fully satisfied     B. Human wants are unlimited and can never be fully satisfied     C. Human wants are regulated by the government     D. Human wants are the same for everyone     Answer: B174. A government policy such as import tariffs is an example of:     A. A purely macroeconomic phenomenon with no micro effects     B. An incentive that influences the behavior of businesses and consumers     C. A tool used only in welfare economics     D. An international legal requirement     Answer: B175. "Oikonomia" is a word from which ancient language?     A. Latin     B. Hebrew     C. Greek     D. Arabic     Answer: C176. The study of economics helps business managers by enabling them to predict:     A. Stock market prices with certainty     B. How changes in tax law or minimum wage affect operations and profitability     C. The exact future GDP of a country     D. Consumer preferences with certainty     Answer: B177. A meaningful difference between economics of the 18th century and modern economics is that modern economics:     A. Ignores scarcity     B. Focuses only on wealth accumulation     C. Emphasizes distributing scarce resources among different people     D. Avoids the study of human behavior     Answer: C178. Which of the following scenarios demonstrates the concept of elasticity in a macroeconomic context?     A. A consumer switching from one brand of soap to another     B. The sensitivity of national investment levels to changes in interest rates     C. A firm adjusting its price in response to competitor actions     D. A consumer's response to a change in income     Answer: B179. At what point on a straight-line demand curve does price elasticity equal infinity?     A. At the quantity axis intercept     B. At the midpoint     C. At the price axis intercept     D. Below the midpoint     Answer: C180. At what point on a straight-line demand curve does price elasticity equal zero?     A. At the price axis intercept     B. At the midpoint     C. Above the midpoint     D. At the quantity axis intercept     Answer: D181. The study of economics as a social science implies that economics:     A. Has no connection to human behavior     B. Uses systematic methods to understand human behavior     C. Is concerned only with mathematical models     D. Ignores observable phenomena     Answer: B182. When economists "test theories against real-world data," they are applying:     A. Pure mathematical reasoning     B. The social science approach of economics     C. Government policy analysis     D. Historical narrative methods     Answer: B183. In the example of a person with ₦100 choosing between a notebook and attending a football match, the person must:     A. Find more money to buy both     B. Make an economic choice due to scarcity     C. Ask the government for help     D. Reject both options     Answer: B184. A well-functioning economy ensures that scarce resources are allocated:     A. Only to the richest members of society     B. Entirely by government mandate     C. Efficiently to meet the varied needs of its members     D. Randomly without any system     Answer: C185. From which ancient Greek concept does the word "economist" directly originate?     A. "Politikos" meaning statesman     B. "Oikonomia" meaning household management     C. "Logos" meaning reason     D. "Demos" meaning people     Answer: B186. Which of the following correctly shows the order of stages in microeconomic resource allocation analysis?     A. Single market → All markets → Individual consumers and producers     B. Individual consumers and producers → Single market → All markets simultaneously     C. All markets → Single market → Individual consumers     D. Individual consumers → All markets → Single market     Answer: B187. The text states that economics has grown into a discipline that explains individual behavior and also:     A. Replaces political science     B. Guides business decisions, informs government policy, and fosters international understanding     C. Makes all economic predictions 100% accurate     D. Eliminates the problem of scarcity     Answer: B188. A rise in the price of a commodity causes producers to:     A. Supply less due to higher costs     B. Exit the market immediately     C. Supply more because they expect higher profits     D. Maintain the same level of supply     Answer: C189. The role of economics in international business careers is:     A. To replace the need for language skills     B. To provide knowledge of socio-economic events and global commerce     C. To train employees in manufacturing     D. To replace legal knowledge     Answer: B190. The term "Pareto-optimal conditions" in microeconomics describes:     A. Conditions where all workers are employed     B. Conditions of economic efficiency where all inefficiencies are eliminated     C. Conditions of maximum government spending     D. Conditions of maximum imports     Answer: B191. According to the text, the analysis of economics using models and data can be done in which forms?     A. Only verbal form     B. Only graphical form     C. Mathematical or statistical form     D. Only policy documents     Answer: C192. Using Q = 48 – 7P, if P = 2, what is the value of Q?     A. 32     B. 33     C. 34     D. 35     Answer: C193. The concept of "measures of central tendency" is a tool used by economists to:     A. Measure government debt levels     B. Summarize large datasets with a single representative value for analysis     C. Set market prices     D. Determine exchange rates     Answer: B194. "Conditional predictions" in economics are useful because they help:     A. Eliminate all uncertainty from economic decisions     B. Equip analysts and policymakers to make informed forecasts based on given assumptions     C. Replace the need for data collection     D. Make economic models unnecessary     Answer: B195. Which of the following best explains why all prices in microeconomics are considered "relative"?     A. Prices are set by the government uniformly     B. A change in one price affects other prices in both product and factor markets     C. Prices only change due to international factors     D. All goods have the same price in a competitive market     Answer: B196. The history of economics shows that its definition evolved from a focus on wealth to emphasizing:     A. Only government management     B. International trade alone     C. Human behavior and the allocation of scarce resources     D. The management of military resources     Answer: C197. The stage of microeconomic analysis that examines how all markets reach equilibrium simultaneously is:     A. Stage One     B. Stage Two     C. Stage Three     D. Stage Four     Answer: C198. An economy that grows food, makes clothing, and designs computer software is demonstrating:     A. That there is no scarcity     B. The allocation of scarce resources to meet varied needs through specialization     C. That the government controls everything     D. That economics is irrelevant to production     Answer: B199. When economists observe market interactions and measure how prices change over time, they are applying economics as:     A. A pure art form     B. A social science     C. A natural science     D. A branch of philosophy only     Answer: B200. The conclusion of the ECO 101 topics affirms that grasping the fundamental principles of economics equips:     A. Only professional economists     B. Students and citizens alike to navigate complex economic realities of everyday life     C. Only government officials     D. Only business executives     Answer: B

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Phy 107 ( PHY 191) Past Questions and Answers

TAKE PHY 107 QUIZPHY 191 — 2019/2020 Session1. What is the relative density of a liquid if an object weighs 20N in air, 17N when totally immersed in water and 18N when totally immersed in the liquid?   A. 1.5   B. 0.67   C. 0.94   D. 1.05   Answer: C2. The general equation of a straight line graph is given as:   A. Y = Mx + C   B. Y = Mx² + C   C. Y = Mx + c²   D. Y = M + Cx   Answer: A3. 0.2g/cm³ in S.I unit is:   A. 0.2x10¹ kg/m³   B. 0.2kg/Cm³   C. 2.0kg/Cm³   D. 2000kg/m³   Answer: D4. Internal diameter of an object is measured by:   A. Vernier Calliper   B. Screw Gauge   C. External Jaws   D. Internal Jaws   Answer: A5. The expression for a loaded spring performing SHM is given by M = 8LT²/4π² - M₀. A student plotted the graph of M Vs T². The slope of the graph is:   A. Lg/T²   B. 1/4π²   C. g/4πL   D. 4π²/Lg   Answer: B6. The inverse of the intercept on M-axis is:   A. -1/M₀   B. 1/M₀   C. M-M₀   D. 1/M+M₀   Answer: B7. Uncertainties encountered in making observations are known as:   A. Precision   B. Reliability   C. Errors   D. Accuracy   Answer: C8. An object has a specific heat capacity of 200J/Kg/°C. If 1x10⁵J of energy is required to change its temperature from 20°C to 70°C, determine its mass:   A. 100Kg   B. 27Kg   C. 17.5Kg   D. 10Kg   Answer: D9. The heat transfer reaches us through:   A. Conduction   B. Radiation   C. Convention   D. Reflection   Answer: B10. Vernier calliper has two scales:    A. Vernier scale and mid scale    B. Main scale and minor scale    C. Main and vernier scale    D. None of the above    Answer: C11. The standard error in the slope of a graph is 3.0 while its range and number of readings are 0.62 and 6 respectively. The vertical width scatter is:    A. 2.79    B. 2.88    C. 1.8    D. 10.8    Answer: B12. The number of significant figures in 4.07x10¹⁵m is:    A. 1    B. 3    C. 14    D. 15    Answer: B13. A small bob of mass 20g oscillate as a simple pendulum with amplitude 5cm and a period of 2 seconds. Find the velocity of the bob when the velocity is maximum:    A. 0.05ms⁻¹    B. 3.14ms⁻¹    C. 0.16ms⁻¹    D. 0.001ms⁻¹    Answer: C14. A Vapour whose molecules are in dynamic equilibrium with those of its liquids is said to be:    A. Saturated    B. Unsaturated    C. Gaseous    D. Diffused    Answer: A15. The instrument used in measuring relative density is:    A. Hygrometer    B. Hydrometer    C. Hydrometer    D. Barometer    Answer: B16. If a simple pendulum performing SHM swings to maximum amplitude, its kinetic energy is:    A. Zero    B. Maximum    C. Twice its potential    D. Equal to its potential    Answer: A17. In an experiment, the vernier calliper was used to measure the breadth to be 2.40cm and the thickness to be 0.45cm of the metre rule. Find the volume of the metre rule:    A. 123.0cm    B. 105.0cm    C. 108.0cm    D. 109.0cm    Answer: C18. Given that L = 20.00±0.05 and w = 15.00±0.05cm, What is the maximum error in the sum:    A. 0.1cm    B. 0.01cm    C. 0.05cm    D. 0.001cm    Answer: A*Suppose the formulae relating E, R, r and I is I = E/(R+r), where I and R are variables and E and r are constants. Use the equation to answer questions 19, 20, 21 and 22*19. Transform the above equation to the form y = mx + c:    A. 1/I = R(1/E) + r/E    B. 1/I = 1/R + IE    C. r/I = 1/I + 1/E    D. EI = 1/(R+r)    Answer: A20. What is the equivalent of y:    A. 1/I    B. r/E    C. r/R    D. IE    Answer: A21. What is the equivalent of x:    A. 1/I    B. R    C. r/E    D. 1/E    Answer: B22. Deduce the intercept:    A. r/B    B. Rr/I    C. 1/E    D. r/E    Answer: D23. Consider the expression, T² = (π/g)L², where T² and L² are variables. If L² is plotted as abscissa and T² as ordinate, the slope of the resulting graph is:    A. π/g    B. 1/g    C. 1/g    D. π/g    Answer: A24. What is the reading accuracy of a vernier calliper:    A. 0.1cm    B. 0.001cm    C. 0.01cm    D. 0.0001cm    Answer: C*If the circular scale of micrometer screw gauge is divided into 100 equal parts and it moves 0.5mm in one revolution, use the above information to answer questions 25 and 26*25. The pitch is:    A. 100    B. 0.01    C. 0.5    D. 25    Answer: C26. Find the least count of the gauge:    A. 0.5    B. 0.05    C. 0.1    D. 0.005    Answer: D27. A graduated cylinder is marked every millilitre. How precise a measurement can you make with this instrument:    A. ±1mL    B. ±0.5mL    C. ±1.0mL    D. ±0.5cL    Answer: B*If X = 10.10 ± 0.05; Y = 6.03 ± 0.01; Z = 3.04 ± 0.02 and U = X + Y + Z, Use the above information to answer questions 28 and 29*28. Calculate the maximum error in U:    A. 19.17±0.08    B. 13.094±0.3    C. 13.094±0.2    D. 19.094±0.2    Answer: A29. Calculate the standard error in U:    A. 19.09±0.03    B. 19.17±0.06    C. 19.27±0.08    D. None of the above    Answer: B30. Least count of screw gauge is:    A. 0.01cm    B. 0.5cm    C. 0.1cm    D. 0.01mm    Answer: D---PHY 191/193 — 2017/2018 Session1. What is the relative density of a liquid if an object weighs 10.0N in air, 7.0N when totally immersed in water and 7.06N when immersed in the liquid:   A. 0.80   B. 0.60   C. 0.006 N   D. 0.08 N   Answer: A*The length L, and width W of an object are: L = 20±0.05 cm, W = 15.00±0.05 cm. Use the above information to answer questions 2 and 3*2. The sum of the measurement is:   A. 35.0cm   B. 35.0±0.01cm   C. 35.001cm   D. 35.0±0.1cm   Answer: D3. The maximum error in the sum above is given by:   A. 0.1cm   B. ±0.01cm   C. ±0.1cm   D. ±0.001cm   Answer: C4. Internal diameter of a beaker can be accurately measured using:   A. Internal jaws of a Vernier caliper   B. Micrometer screw gauge   C. A meter-rule   D. External jaws of a vernier caliper   Answer: A5. Vernier callipers has two scales namely:   A. Main and vernier scale   B. Vernier scale and mid scales   C. Main and minor scale   D. Main and circular scale   Answer: A6. If density of water is 1000Kg/m³, acceleration due to gravity is 10.0m/s², the pressure due to water at the bottom of a 20m deep tank which is half filled is:   A. 1000kpa   B. 100kpa   C. 10kpa   D. 200kpa   Answer: C7. A useful instrument for the direct measurement of the weight of an object is:   A. Beam balance   B. Spring balance   C. Top loading balance   D. Lever balance   Answer: B8. If a simple pendulum performing simple harmonic motion swings to maximum amplitude, its kinetic energy is:   A. Maximum   B. Twice its potential energy   C. Equal to its potential energy   D. Zero   Answer: D9. 0.2g/cm³ in S.I unit is:   A. 0.2x10³ Kg/m³   B. 0.2 Kg/cm³   C. 2.0 Kg/cm³   D. 2000 Kg/m³   Answer: D*A student plotted the graph of m against T². Use the information to answer questions 10 and 11*10. The slope of the graph is:    A. Lg/π²    B. g/4πL    C. 4π/Lg 4π²    D. L/4π²    Answer: D11. The inverse of the intercept on M-axis is:    A. -1/M₀    B. 1/M₀    C. M-M₀    D. 1/M+M₀    Answer: B12. Least count of screw gauge is:    A. 0.01mm    B. 0.01cm    C. 0.5cm    D. 0.1cm    Answer: A13. Barrel of screw gauge has:    A. 50 divisions    B. 100 divisions    C. 10 divisions    D. 45 divisions    Answer: B14. Digital stopwatches show reading up to:    A. 3 decimal places    B. Decimal place    C. 4 significant figure    D. 2 decimal places    Answer: D15. What is the maximum acceleration of the object in Fig. 1?    A. 0.025 ms⁻²    B. 002.5 ms⁻²    C. 009.8 ms⁻²    D. 00.99 ms⁻²    Answer: B16. Error due to manually stopping a stopwatch is termed as:    A. Climax error    B. Human reaction error    C. Rateability error    D. Human reaction time    Answer: B17. In SHM of a simple pendulum, component of weight which is directed towards mean position is:    A. mg cosθ    B. 0    C. mg tanθ    D. mg sinθ    Answer: D18. Error that occurs due to equally affected measurements is called:    A. Random error    B. Frequent error    C. Precision    D. Systematic error    Answer: D19. Systematic error that occurred due to poor calibration of instrument that can be corrected by:    A. Taking several readings    B. Replacing instruments    C. Taking mean of values    D. Taking median of values    Answer: B20. A group of students are told to use a meter stick to find the length of a hallway. They make 6 independent measurements: 4.402 m, 4.217 m, 4.345 m, 4.925 m, 4.372 m, 4.289 m. How should they report their best estimate of the length of the hallway?    A. L = 4.43 ± 0.25 m    B. L = 4.325 ± 0.073 m    C. L = 4.425 ± 0.104 m    D. L = 4.33 ± 0.03 m    Answer: C21. A student uses a protractor to measure an angle to be A = 82° ± 1°. What should she report for sin(A)?    A. sin(A) = 0.990 ± 0.002    B. sin(A) = 1.0 ± 0.2    C. sin(A) = 0.99 ± 0.02    D. sin(A) = 0.9903 ± 0.0024    Answer: D22. A student performs a simple experiment to find the average acceleration of a falling object. He drops a baseball from a building and uses a string and meter stick to measure the height the ball was dropped. He used a stopwatch to find an average time of fall for 3 trials from the same height: t = 5.25 ± 0.15 m, t = 1.14 ± 0.06 s. Use the equation a = 2h/t² to determine the average acceleration and its uncertainty:    A. 8.08 ± 0.1 m/s²    B. 8.08 ± 0.88 m/s²    C. 8.1 ± 0.9 m/s²    D. 8.08 ± 0.06 m/s²    Answer: B23. The rate of change of bending moment is equal to:    A. Stress    B. Deflection    C. Strain    D. Shear force    Answer: D24. A cantilever beam of span 3m carries a point load 100N at the free end. The maximum bending moment in the beam will be:    A. 100 N-m    B. 300 N-m    C. 150 N-m    D. 600 N-m    Answer: B25. The reading accuracy of a meter rule is:    A. 0.2cm    B. 0.5cm    C. 0.1cm    D. 0.01cm    Answer: D26. In Hooke's law experiment, the meter rule is held with its zero mark up to avoid:    A. Non-linear expansion    B. Negative extension    C. Positive extension    D. Apparent extension    Answer: A27. A 13 Kg aluminium block of specific heat capacity 480J/Kg°C was heated from 85°C to 122°C. Its heat gain is:    A. 423KJ    B. 11.44KJ    C. 32.50KJ    D. 423.2KJ    Answer: A28. If two quantities are inversely proportional then graph between y and 1/x gives:    A. Straight line cutting y-axis    B. A parabolic curve    C. A hyperbolic curve    D. Straight line through origin    Answer: D29. A set of independent current measurements recorded as 10.03, 10.10, 10.11 and 10.08. The average range of error in the current is:    A. 10.08 A    B. 0.03 A    C. 0.04 A    D. 0.05 A    Answer: C30. In a science lab, a student heats up a chemical from 10°C to 25°C which requires thermal energy of 30000J. If mass of object is 40kg, specific heat capacity of chemical would be:    A. 25 J·kg⁻¹·°C⁻¹    B. 75 J·kg⁻¹·°C⁻¹    C. 100 J·kg⁻¹·°C⁻¹    D. 50 J·kg⁻¹·°C⁻¹    Answer: D31. A 250cm³ flask of glass filled with seawater weighs 350g. Density of seawater if empty flask weighs 100g would be:    A. 5/7 g/cm³    B. 5/3 g/cm³    C. 5/g cm³    D. 1 g/cm³    Answer: A32. If Y = log b, A graph of log y against log b will have a slope and intercept equals to respectively:    A. n and logx n    B. logx n and n    C. b and n    D. n and b    Answer: A33. Air trapped inside a single-piston-cylinder exerts a pressure of 760 mmHg. If its volume is increased by 20% at constant temperature, pressure exerted would be equal to:    A. 533 mmHg    B. 544 mmHg    C. 534 mmHg    D. 633 mmHg    Answer: A34. A mercury thermometer was calibrated: ice point corresponds to 3cm while steam point corresponds to 30cm of mercury. If length = 10cm, the temperature corresponds to:    A. 26°C    B. 22°C    C. 20°C    D. 24°C    Answer: D35. Bolometer is used to measure:    A. Temperature    B. Velocity    C. Frequency    D. Wavelength    Answer: D36. A particle of mass m oscillates in a straight line with SHM of constant amplitude. The total energy of the particle is E. What is the total energy of another particle of mass 2m, oscillating with SHM of the same amplitude but double the frequency?    A. 8E    B. 2E    C. 2ED    D. 4E    Answer: A37. 10 Km/hr in S.I units is:    A. 2m/s    B. 0.5m/s    C. 2.8m/s    D. 10m/s    Answer: C38. A spherical ball falls 60cm through a viscous liquid in 1.2 seconds. Its velocity is:    A. 5m/s    B. 60cm/s    C. 0.5m/s    D. 50cm/min    Answer: C39. In calorimetry, the walls of the calorimeter is lagged to prevent heat loss by:    A. Radiation    B. Conduction    C. Convection    D. Conduction and convection    Answer: A40. Error in slope is given by:    A. nR/4W    B. 4nR/W    C. 4W/nR    D. 4/nR    Answer: CMORE QUESTIONS1. Which of the following is a fundamental unit in the SI system?   A. Newton   B. Joule   C. Kilogram   D. Watt   Answer: C2. The dimensional formula for pressure is:   A. MLT⁻²   B. ML⁻¹T⁻²   C. ML²T⁻²   D. MLT⁻¹   Answer: B3. Which instrument has the least count of 0.001cm?   A. Metre rule   B. Vernier calliper   C. Micrometer screw gauge   D. Measuring tape   Answer: C4. The number of significant figures in 0.00340 is:   A. 5   B. 2   C. 3   D. 6   Answer: C5. Convert 72 km/h to m/s:   A. 10 m/s   B. 20 m/s   C. 25 m/s   D. 30 m/s   Answer: B6. The SI unit of luminous intensity is:   A. Lumen   B. Candela   C. Lux   D. Watt   Answer: B7. Which of the following has the dimension of energy?   A. Force × velocity   B. Force × distance   C. Force × acceleration   D. Force × time   Answer: B8. 1 nanometre is equal to:   A. 10⁻⁶ m   B. 10⁻⁹ m   C. 10⁻¹² m   D. 10⁻³ m   Answer: B9. The uncertainty in a measurement of 25.6 ± 0.5 cm expressed as a percentage is approximately:   A. 1.56%   B. 1.95%   C. 2.50%   D. 0.50%   Answer: B10. Which of the following is a derived unit?    A. Ampere    B. Kelvin    C. Pascal    D. Mole    Answer: C11. The difference between the measured value and the true value of a quantity is called:    A. Relative error    B. Absolute error    C. Percentage error    D. Standard deviation    Answer: B12. When two quantities X and Y are multiplied, the percentage error in the product is:    A. The product of individual percentage errors    B. The difference of individual percentage errors    C. The sum of individual percentage errors    D. The ratio of individual percentage errors    Answer: C13. A student records the following values: 2.5, 2.7, 2.4, 2.6 cm. The mean value is:    A. 2.4 cm    B. 2.5 cm    C. 2.6 cm    D. 2.55 cm    Answer: D14. Random errors can be reduced by:    A. Using a better instrument    B. Taking repeated readings and averaging    C. Replacing the instrument    D. Calibrating the instrument    Answer: B15. The error that results from an instrument not being zeroed properly is:    A. Random error    B. Human error    C. Systematic error    D. Gross error    Answer: C16. If A = 5.0 ± 0.1 cm and B = 3.0 ± 0.1 cm, the value of A − B with error is:    A. 2.0 ± 0.0 cm    B. 2.0 ± 0.2 cm    C. 2.0 ± 0.1 cm    D. 2.0 ± 0.01 cm    Answer: B17. The precision of an instrument refers to:    A. How close a measurement is to the true value    B. How reproducible repeated measurements are    C. The smallest reading the instrument can measure    D. The range of the instrument    Answer: B18. A micrometer reads 2.35mm when measuring a wire three times. This suggests the readings are:    A. Accurate but not precise    B. Precise but not necessarily accurate    C. Neither accurate nor precise    D. Both accurate and precise    Answer: B19. If Z = X/Y, the fractional error in Z is:    A. ΔX/X − ΔY/Y    B. ΔX/X × ΔY/Y    C. ΔX/X + ΔY/Y    D. ΔX × ΔY    Answer: C20. The reading error of a metre rule is typically:    A. ± 0.5 mm    B. ± 0.01 mm    C. ± 0.001 mm    D. ± 5 mm    Answer: A21. The slope of a graph of velocity against time represents:    A. Displacement    B. Speed    C. Acceleration    D. Distance    Answer: C22. A straight line graph passes through the origin. This means:    A. The two variables are inversely proportional    B. The two variables are directly proportional    C. The intercept is maximum    D. The slope is zero    Answer: B23. On a graph of y = 3x + 5, the y-intercept is:    A. 3    B. 0    C. 5    D. −5    Answer: C24. The area under a velocity-time graph represents:    A. Acceleration    B. Displacement    C. Force    D. Power    Answer: B25. If a graph of 1/v against 1/u gives a straight line, the relationship between u and v is:    A. Linear    B. Quadratic    C. Reciprocal/linear    D. Exponential    Answer: C26. In a linear graph y = mx + c, if c = 0 and m is negative, the graph:    A. Passes through origin with positive slope    B. Passes through origin with negative slope    C. Has a positive intercept    D. Has a negative slope and positive intercept    Answer: B27. Which of the following best describes a graph with a hyperbolic shape?    A. y is directly proportional to x    B. y is directly proportional to x²    C. y is inversely proportional to x    D. y is independent of x    Answer: C28. A graph of T² against L for a simple pendulum gives a straight line whose slope equals:    A. g/4π²    B. 4π²/g    C. 2π/g    D. g/2π    Answer: B29. The intercept on the y-axis of the graph y = 5x − 3 is:    A. 5    B. 3    C. −3    D. −5    Answer: C30. In error analysis, the best-fit line on a graph is drawn to:    A. Connect all data points    B. Pass through the origin always    C. Minimize overall deviation from data points    D. Maximize the slope    Answer: C31. The period of a simple pendulum depends on:    A. Mass of the bob    B. Amplitude of oscillation    C. Length of the pendulum    D. Material of the bob    Answer: C32. The acceleration of a body undergoing SHM is:    A. Proportional to displacement and in same direction    B. Proportional to displacement and in opposite direction    C. Constant throughout the motion    D. Zero at maximum displacement    Answer: B33. At the equilibrium position of a body in SHM, the:    A. Potential energy is maximum    B. Kinetic energy is zero    C. Velocity is maximum    D. Acceleration is maximum    Answer: C34. The period of a mass-spring system is given by:    A. T = 2π√(k/m)    B. T = 2π√(m/k)    C. T = 2π√(g/L)    D. T = 2π√(L/g)    Answer: B35. For a simple pendulum of length 1m, taking g = 10m/s², the period is approximately:    A. 3.14 s    B. 6.28 s    C. 1.99 s    D. 0.50 s    Answer: C36. The total mechanical energy of a body in SHM is:    A. Zero    B. Constant    C. Maximum at equilibrium    D. Minimum at equilibrium    Answer: B37. At maximum displacement in SHM:    A. Kinetic energy is maximum    B. Potential energy is zero    C. Potential energy is maximum    D. Velocity is maximum    Answer: C38. The frequency of SHM is defined as:    A. Number of oscillations per minute    B. Time for one complete oscillation    C. Number of complete oscillations per second    D. Distance covered per second    Answer: C39. A spring of force constant 200 N/m has a 0.5 kg mass attached. Its angular frequency is:    A. 10 rad/s    B. 20 rad/s    C. 40 rad/s    D. 400 rad/s    Answer: B40. The restoring force in SHM is:    A. F = ma    B. F = −kx    C. F = kx²    D. F = mg    Answer: B41. The specific latent heat of vaporization is the heat required to:    A. Raise the temperature of 1kg of substance by 1°C    B. Change 1kg of liquid to gas at constant temperature    C. Change 1kg of solid to liquid at constant temperature    D. Lower the temperature of 1kg of substance by 1°C    Answer: B42. Which law of thermodynamics states that heat cannot spontaneously flow from a cold body to a hot body?    A. Zeroth law    B. First law    C. Second law    D. Third law    Answer: C43. The amount of heat required to raise the temperature of 2kg of water by 5°C (specific heat capacity of water = 4200 J/kg°C) is:    A. 42000 J    B. 21000 J    C. 8400 J    D. 4200 J    Answer: A44. Which mode of heat transfer does not require a medium?    A. Conduction    B. Convection    C. Radiation    D. Advection    Answer: C45. A good absorber of heat radiation is also:    A. A poor emitter    B. A good emitter    C. A poor reflector only    D. Neither emitter nor reflector    Answer: B46. The relationship between Celsius and Kelvin temperature scale is:    A. K = °C − 273    B. K = °C × 273    C. K = °C + 273    D. K = °C / 273    Answer: C47. In an ideal gas, when temperature is constant, pressure is:    A. Directly proportional to volume    B. Inversely proportional to volume    C. Independent of volume    D. Equal to volume    Answer: B48. The process in which a gas expands without exchanging heat with the surroundings is called:    A. Isothermal    B. Isobaric    C. Isochoric    D. Adiabatic    Answer: D49. Which thermometric property is used in a mercury-in-glass thermometer?    A. Change in resistance    B. Change in volume    C. Change in pressure    D. Change in EMF    Answer: B50. The temperature at which all molecular motion ceases is:    A. 0°C    B. −100°C    C. −273°C    D. 100°C    Answer: C51. The relative density of a substance is defined as:    A. Mass of substance / Mass of equal volume of water    B. Weight of substance / Weight of equal volume of water    C. Density of substance / Density of water    D. All of the above    Answer: D52. An object weighs 80N in air and 60N when fully immersed in water. Its relative density is:    A. 2    B. 3    C. 4    D. 6    Answer: C53. A hydrometer measures:    A. Temperature of a liquid    B. Relative density of a liquid    C. Pressure of a liquid    D. Volume of a liquid    Answer: B54. If an object sinks in water, its density is:    A. Less than water    B. Equal to water    C. Greater than water    D. Zero    Answer: C55. The SI unit of density is:    A. g/cm³    B. kg/m²    C. kg/m³    D. g/m³    Answer: C56. An object has a mass of 500g and volume of 250cm³. Its density is:    A. 0.5 g/cm³    B. 1.0 g/cm³    C. 2.0 g/cm³    D. 4.0 g/cm³    Answer: C57. The upthrust on an object immersed in a fluid is equal to:    A. Weight of the object    B. Mass of fluid displaced    C. Weight of fluid displaced    D. Volume of the object    Answer: C58. An object floats when:    A. Its density equals that of the fluid    B. Its weight equals the upthrust    C. Both A and B    D. Its volume is large    Answer: C59. The relative density of iron is 7.8. Its density in kg/m³ is:    A. 780 kg/m³    B. 7800 kg/m³    C. 78 kg/m³    D. 78000 kg/m³    Answer: B60. A liquid has a density of 800 kg/m³. Its relative density is:    A. 0.08    B. 0.8    C. 8.0    D. 80    Answer: B61. Pressure is defined as:    A. Force multiplied by area    B. Force divided by area    C. Area divided by force    D. Mass divided by volume    Answer: B62. The SI unit of pressure is:    A. Newton    B. Pascal    C. Joule    D. Bar    Answer: B63. The pressure at the bottom of a liquid column is given by:    A. P = ρg    B. P = ρgh    C. P = mgh    D. P = mg/h    Answer: B64. Standard atmospheric pressure in Pascals is approximately:    A. 1.01 × 10³ Pa    B. 1.01 × 10⁵ Pa    C. 1.01 × 10⁴ Pa    D. 1.01 × 10⁶ Pa    Answer: B65. A barometer is used to measure:    A. Liquid pressure    B. Atmospheric pressure    C. Gas pressure in a container    D. Blood pressure    Answer: B66. According to Pascal's principle, pressure applied to an enclosed fluid:    A. Decreases throughout the fluid    B. Is transmitted unequally    C. Is transmitted equally in all directions    D. Acts only downward    Answer: C67. A hydraulic press has pistons of area 2cm² and 100cm². If a force of 10N is applied to the smaller piston, the force on the larger piston is:    A. 50 N    B. 200 N    C. 500 N    D. 1000 N    Answer: C68. The instrument used to measure gas pressure in a container is:    A. Barometer    B. Hydrometer    C. Manometer    D. Thermometer    Answer: C69. Atmospheric pressure can support a column of water of height approximately:    A. 0.76 m    B. 7.6 m    C. 10.3 m    D. 76 m    Answer: C70. Which of the following increases pressure in a liquid?    A. Decreasing depth    B. Decreasing density of liquid    C. Increasing depth    D. Decreasing gravity    Answer: C71. The distance between two successive crests of a wave is called:    A. Amplitude    B. Frequency    C. Wavelength    D. Period    Answer: C72. The speed of a wave is related to frequency and wavelength by:    A. v = f/λ    B. v = λ/f    C. v = fλ    D. v = f + λ    Answer: C73. Transverse waves can be:    A. Polarized    B. Refracted only    C. Diffracted only    D. Reflected only    Answer: A74. Sound waves are:    A. Transverse waves    B. Electromagnetic waves    C. Longitudinal waves    D. Surface waves    Answer: C75. The phenomenon by which waves bend around obstacles is called:    A. Reflection    B. Refraction    C. Diffraction    D. Interference    Answer: C76. When a wave moves from a less dense to a more dense medium, it:    A. Speeds up    B. Slows down    C. Maintains the same speed    D. Disappears    Answer: B77. The refractive index of a medium is defined as:    A. Speed of light in medium / Speed of light in vacuum    B. Speed of light in vacuum / Speed of light in medium    C. Wavelength in vacuum / Wavelength in medium    D. Both B and C    Answer: D78. The critical angle is the angle of incidence at which the angle of refraction is:    A. 0°    B. 45°    C. 90°    D. 180°    Answer: C79. Which of the following colours has the highest frequency?    A. Red    B. Yellow    C. Green    D. Violet    Answer: D80. The speed of light in vacuum is approximately:    A. 3 × 10⁶ m/s    B. 3 × 10⁸ m/s    C. 3 × 10¹⁰ m/s    D. 3 × 10⁴ m/s    Answer: B81. Ohm's law states that:    A. V = IR²    B. V = I/R    C. V = IR    D. R = VI    Answer: C82. The SI unit of electrical resistance is:    A. Volt    B. Ampere    C. Ohm    D. Watt    Answer: C83. Three resistors of 2Ω, 3Ω and 6Ω are connected in parallel. The equivalent resistance is:    A. 11 Ω    B. 1 Ω    C. 6 Ω    D. 3 Ω    Answer: B84. The power dissipated in a resistor is given by:    A. P = V²R    B. P = I²R    C. P = IR²    D. P = V/IR    Answer: B85. The instrument used to measure electric current is:    A. Voltmeter    B. Galvanometer    C. Ammeter    D. Ohmmeter    Answer: C86. A voltmeter is connected in a circuit:    A. In series    B. In parallel    C. In series-parallel    D. At right angles    Answer: B87. Kirchhoff's current law states that:    A. The sum of EMFs in a loop equals zero    B. The algebraic sum of currents at a junction is zero    C. Current is proportional to voltage    D. Resistance increases with temperature    Answer: B88. The unit of capacitance is:    A. Henry    B. Farad    C. Ohm    D. Coulomb    Answer: B89. Which of the following materials is a good conductor of electricity?    A. Glass    B. Rubber    C. Copper    D. Plastic    Answer: C90. The electromotive force (EMF) of a source is the energy supplied per:    A. Unit time    B. Unit charge    C. Unit resistance    D. Unit current    Answer: B91. Newton's first law of motion is also known as the law of:    A. Acceleration    B. Action and reaction    C. Inertia    D. Gravitation    Answer: C92. The impulse of a force is equal to:    A. Change in kinetic energy    B. Change in momentum    C. Force × distance    D. Mass × acceleration    Answer: B93. A body of mass 5kg is accelerated at 4m/s². The net force acting on it is:    A. 1.25 N    B. 9 N    C. 20 N    D. 40 N    Answer: C94. The law of conservation of momentum states that:    A. Momentum is always zero    B. Total momentum of a system remains constant in the absence of external forces    C. Momentum equals kinetic energy    D. Momentum increases with velocity    Answer: B95. A car of mass 1000kg moving at 20m/s has a kinetic energy of:    A. 10,000 J    B. 100,000 J    C. 200,000 J    D. 400,000 J    Answer: C96. The work done by a force of 50N acting over a distance of 10m at an angle of 60° to the direction of motion is:    A. 500 J    B. 433 J    C. 250 J    D. 866 J    Answer: C97. The gravitational potential energy of a body of mass m at height h is:    A. mgh²    B. mh    C. mgh    D. mg/h    Answer: C98. When a body is thrown vertically upward, at maximum height its velocity is:    A. Maximum    B. Equal to initial velocity    C. Zero    D. Equal to g    Answer: C99. The escape velocity from the Earth's surface is approximately:    A. 7.9 km/s    B. 11.2 km/s    C. 3.0 km/s    D. 9.8 km/s    Answer: B100. A projectile is launched horizontally. The horizontal component of its velocity:     A. Increases with time     B. Decreases with time     C. Remains constant     D. Becomes zero at maximum height     Answer: C

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