EBSU-PHY 191 Past Questions and Answers

Title: EBSU-PHY 191 Past Questions and Answers
URL: https://studentsdash.com/ebsu-phy-191-past-questions-and-answers/
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What is the primary purpose of a vernier caliper?
a) To measure mass
b) To measure length with high precision
c) To measure temperature
d) To measure volume
Answer:
b) To measure length with high precision
Which instrument is used to measure electrical current?
a) Voltmeter
b) Ammeter
c) Ohmmeter
d) Multimeter
Answer:
b) Ammeter
What is the principle behind the use of a barometer?
a) Measuring temperature changes
b) Measuring atmospheric pressure
c) Measuring humidity levels
d) Measuring wind speed
Answer:
b) Measuring atmospheric pressure
In an experiment measuring the acceleration due to gravity, which method is commonly used?
a) Measuring time taken for a ball to roll down a ramp
b) Dropping an object and timing its fall
c) Using a pendulum
d) All of the above
Answer:
d) All of the above
What type of energy is measured with a spring scale?
a) Kinetic energy
b) Gravitational potential energy
c) Elastic potential energy
d) Thermal energy
Answer:
c) Elastic potential energy
Which law explains the relationship between pressure and volume of a gas?
a) Newton’s First Law
b) Charles’s Law
c) Boyle’s Law
d) Ohm’s Law
Answer:
c) Boyle’s Law
What does a power meter measure?
a) Voltage
b) Current
c) Power
d) Resistance
Answer:
c) Power
What is the unit of force in the International System of Units (SI)?
a) Joule
b) Newton
c) Pascal
d) Watt
Answer:
b) Newton
Which device is used to measure the angle of an inclined plane?
a) Protractor
b) Clinometer
c) Compass
d) Level
Answer:
b) Clinometer
What is the purpose of a stopwatch in physics experiments?
a) To measure mass
b) To measure time intervals
c) To measure temperature
d) To measure distance
Answer:
b) To measure time intervals
In an experiment to determine specific heat capacity, what is the main variable measured?
a) Temperature change
b) Volume
c) Pressure
d) Mass of the substance
Answer:
a) Temperature change
What does the term “resonance” refer to in a physics experiment?
a) The absorption of sound waves
b) The amplification of sound at certain frequencies
c) The reflection of light waves
d) The dissipation of energy
Answer:
b) The amplification of sound at certain frequencies
Which law states that the total energy in a closed system remains constant?
a) Newton’s Second Law
b) Conservation of Energy
c) Hooke’s Law
d) Ohm’s Law
Answer:
b) Conservation of Energy
What is the primary function of a resistor in an electric circuit?
a) To measure current
b) To provide resistance to current flow
c) To store electrical energy
d) To convert AC to DC
Answer:
b) To provide resistance to current flow
What type of wave is sound?
a) Longitudinal wave
b) Transverse wave
c) Electromagnetic wave
d) Surface wave
Answer:
a) Longitudinal wave
What does a photometer measure?
a) Light intensity
b) Electrical current
c) Temperature
d) Pressure
Answer:
a) Light intensity
In an experiment measuring the density of an object, which of the following is calculated?
a) Volume and mass
b) Length and time
c) Force and acceleration
d) Pressure and temperature
Answer:
a) Volume and mass
Which device is commonly used to measure voltage in a circuit?
a) Ammeter
b) Voltmeter
c) Multimeter
d) Ohmmeter
Answer:
b) Voltmeter
What is the concept of “centripetal force”?
a) Force acting on an object in free fall
b) Force required to keep an object moving in a circular path
c) Force opposing motion
d) Force resulting from gravity
Answer:
b) Force required to keep an object moving in a circular path
What type of energy is associated with the motion of an object?
a) Potential energy
b) Kinetic energy
c) Thermal energy
d) Chemical energy
Answer:
b) Kinetic energy
What is the primary purpose of a heat exchanger in an experiment?
a) To measure temperature changes
b) To transfer heat between fluids
c) To mix different substances
d) To generate electricity
Answer:
b) To transfer heat between fluids
Which of the following is used to measure temperature?
a) Manometer
b) Barometer
c) Thermometer
d) Calorimeter
Answer:
c) Thermometer
What is the effect of increasing the resistance in a circuit while keeping the voltage constant?
a) Current increases
b) Current decreases
c) Voltage decreases
d) Power increases
Answer:
b) Current decreases
What is the purpose of a friction block in physics experiments?
a) To create motion
b) To reduce friction
c) To measure force
d) To study motion on surfaces
Answer:
d) To study motion on surfaces
Which principle is demonstrated by a pendulum?
a) Conservation of mass
b) Conservation of energy
c) Newton’s Third Law
d) Bernoulli’s Principle
Answer:
b) Conservation of energy
What is the formula for calculating work done?
a) Force × Distance
b) Mass × Acceleration
c) Power × Time
d) Energy × Time
Answer:
a) Force × Distance
What does the term “frequency” refer to in wave mechanics?
a) The speed of the wave
b) The distance between wave crests
c) The number of cycles per unit time
d) The amplitude of the wave
Answer:
c) The number of cycles per unit time
What is the relationship between voltage, current, and resistance known as?
a) Newton’s Law
b) Kirchhoff’s Law
c) Ohm’s Law
d) Faraday’s Law
Answer:
c) Ohm’s Law
Which instrument is used to measure the speed of an object?
a) Stopwatch
b) Speedometer
c) Tachometer
d) Anemometer
Answer:
b) Speedometer
What is the purpose of a galvanometer in an experiment?
a) To measure potential difference
b) To measure current
c) To measure resistance
d) To measure frequency
Answer:
b) To measure current
What happens to the frequency of a wave if its wavelength increases while the wave speed remains constant?
a) Frequency increases
b) Frequency decreases
c) Frequency remains the same
d) It becomes zero
Answer:
b) Frequency decreases
Which law relates the pressure and volume of a gas at constant temperature?
a) Charles’s Law
b) Boyle’s Law
c) Avogadro’s Law
d) Ideal Gas Law
Answer:
b) Boyle’s Law
What type of lens is used to focus light rays?
a) Diverging lens
b) Converging lens
c) Flat lens
d) Cylindrical lens
Answer:
b) Converging lens
What does the term “momentum” refer to in physics?
a) The energy of an object at rest
b) The mass of an object times its velocity
c) The force acting on an object
d) The speed of an object
Answer:
b) The mass of an object times its velocity
In a simple circuit, what happens if one component fails?
a) The circuit continues to function
b) The circuit may still function depending on the configuration
c) The circuit completely shuts down
d) The current increases
Answer:
c) The circuit completely shuts down
What is the purpose of a pulley in a physics experiment?
a) To measure weight
b) To change the direction of force
c) To lift objects with less effort
d) All of the above
Answer:
d) All of the above
What is the standard unit of pressure in the SI system?
a) Pascal
b) Bar
c) Atmosphere
d) Torr
Answer:
a) Pascal
What is a common method to determine the density of an irregular object?
a) Measuring its mass only
b) Submerging it in water and measuring the displaced water
c) Calculating its volume using its dimensions
d) Measuring its temperature
Answer:
b) Submerging it in water and measuring the displaced water
What does a capacitor do in a circuit?
a) Stores electrical energy
b) Provides resistance
c) Converts AC to DC
d) Measures voltage
Answer:
a) Stores electrical energy
Which phenomenon explains why a straw appears bent in water?
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer:
b) Refraction
What is the purpose of a digital oscilloscope?
a) To measure temperature
b) To visualize electrical signals
c) To measure resistance
d) To calculate energy
Answer:
b) To visualize electrical signals
What happens to the pressure of a gas when its volume decreases at constant temperature?
a) Pressure increases
b) Pressure decreases
c) Pressure remains the same
d) Pressure fluctuates
Answer:
a) Pressure increases
In a pendulum experiment, what variable is typically measured to determine the effect of length on period?
a) Length of the string
b) Mass of the bob
c) Angle of release
d) Speed of the bob
Answer:
a) Length of the string
What is the function of a fuse in an electrical circuit?
a) To increase voltage
b) To limit current flow
c) To measure resistance
d) To protect against overload
Answer:
d) To protect against overload
What type of energy transformation occurs in a hydroelectric power plant?
a) Mechanical to electrical
b) Electrical to thermal
c) Chemical to mechanical
d) Nuclear to electrical
Answer:
a) Mechanical to electrical
Which principle explains how airplanes generate lift?
a) Bernoulli’s Principle
b) Archimedes’ Principle
c) Newton’s Third Law
d) Pascal’s Principle
Answer:
a) Bernoulli’s Principle
What is the purpose of using a sound level meter?
a) To measure frequency of sound
b) To measure sound intensity
c) To measure speed of sound
d) To measure sound quality
Answer:
b) To measure sound intensity
What happens to the resistance of a wire if its length is doubled?
a) Resistance remains the same
b) Resistance doubles
c) Resistance decreases
d) Resistance quadruples
Answer:
b) Resistance doubles
What is the primary cause of friction in motion?
a) Weight of the object
b) Surface roughness
c) Air resistance
d) Temperature
Answer:
b) Surface roughness
In an electrical circuit, what does the term “short circuit” refer to?
a) A break in the circuit
b) A low-resistance connection between two points
c) A high-resistance connection
d) A circuit with multiple pathways
Answer:
b) A low-resistance connection between two points