Work, Energy, and Power Quiz Quiz. Work, energy, and power are important concepts in physics that explain how forces cause movement, how energy is used, and how fast work is done. These ideas help students to understand how machines operate, how electricity is used, and how human activities involve energy transfer. They are widely applied in homes, industries, transportation, and technology. Prepare for your exam with this 25 Quiz questions.
WORK, ENERGY, AND POWER QUIZ – OBJECTIVE QUESTIONS
1. Work is said to be done when a force
A. Pushes without movement
B. Causes movement in its direction
C. Produces heat only
D. Creates sound
2. The SI unit of work is
A. Watt
B. Joule
C. Newton
D. Volt
3. Work is calculated using the formula
A. W = F × d
B. W = F ÷ d
C. W = F + d
D. W = F − d
4. Energy is the ability to
A. Produce heat
B. Do work
C. Make noise
D. Create force
5. The SI unit of energy is
A. Joule
B. Watt
C. Newton
D. Ampere
Work, Energy, and Power Quiz
6. Which of the following is a form of energy?
A. Force
B. Speed
C. Heat
D. Distance
7. Kinetic energy is the energy of
A. Rest
B. Motion
C. Position
D. Heat
8. An object at rest possesses
A. Kinetic energy
B. Sound energy
C. Potential energy
D. Electrical energy
9. Potential energy is energy due to
A. Motion
B. Speed
C. Position
D. Shape only
10. The formula for kinetic energy is
A. KE = mv
B. KE = mv²
C. KE = ½mv²
D. KE = 2mv²
Work, Energy, and Power Quiz
11. The formula for potential energy is
A. PE = mgh
B. PE = mg/h
C. PE = mh/g
D. PE = gmh²
12. Power is the rate of
A. Energy storage
B. Force application
C. Doing work
D. Heat production
13. The SI unit of power is
A. Joule
B. Watt
C. Newton
D. Volt
14. Power is calculated using the formula
A. P = W × t
B. P = W ÷ t
C. P = t ÷ W
D. P = W + t
15. A machine with high power works
A. Slowly
B. Carelessly
C. Quickly
D. Weakly
16. Which of the following has kinetic energy?
A. A parked car
B. A moving bicycle
C. A sleeping person
D. A standing tree
17. Which of the following has potential energy?
A. A flying bird
B. A rolling ball
C. Water in a dam
D. A running man
18. Electrical appliances consume energy in the form of
A. Sound
B. Light
C. Electrical energy
D. Mechanical energy
19. The commercial unit of electrical energy is
A. Joule
B. Watt
C. Kilowatt-hour
D. Ampere
20. Law of conservation of energy states that energy
A. Can be destroyed
B. Can be created
C. Can neither be created nor destroyed
D. Always increases
Work, Energy, and Power Quiz
21. When a stone is thrown upward, its kinetic energy
A. Increases
B. Remains constant
C. Decreases
D. Becomes zero immediately
22. When the stone reaches its highest point, its kinetic energy is
A. Maximum
B. Minimum
C. Constant
D. Increasing
23. Which energy conversion takes place in an electric fan?
A. Electrical to heat
B. Electrical to mechanical
C. Mechanical to electrical
D. Heat to sound
24. Which of the following devices converts mechanical energy to electrical energy?
A. Motor
B. Generator
C. Bulb
D. Heater
25. The ability of a machine to use energy effectively is called
A. Power
B. Efficiency
C. Force
D. Speed
Work, Energy, and Power Quiz Answers And Explanations
1. Answer: B
Work is done only when a force causes an object to move in the direction of the force.
2. Answer: B
The SI unit of work is the joule, which measures energy transferred by force.
3. Answer: A
Work is calculated by multiplying force by distance moved in the direction of the force.
4. Answer: B
Energy is defined as the ability to do work.
5. Answer: A
The SI unit of energy is the joule, same as work.
6. Answer: C
Heat is a form of energy that can be transferred between objects.
7. Answer: B
Kinetic energy is the energy possessed by a body due to motion.
8. Answer: C
An object at rest may have potential energy because of its position.
9. Answer: C
Potential energy depends mainly on the position of an object.
10. Answer: C
Kinetic energy is given by half of mass multiplied by the square of velocity.
11. Answer: A
Potential energy is calculated using mass, gravity, and height.
12. Answer: C
Power shows how fast work is done or energy is used.
13. Answer: B
Power is measured in watts.
14. Answer: B
Power is equal to work divided by time.
15. Answer: C
High power means work is done quickly.
16. Answer: B
A moving bicycle has kinetic energy because it is in motion.
17. Answer: C
Water in a dam has potential energy due to its height.
18. Answer: C
Electrical appliances use electrical energy to operate.
19. Answer: C
Kilowatt-hour is used for measuring household electrical energy consumption.
20. Answer: C
Energy cannot be created or destroyed, only changed from one form to another.
21. Answer: C
As the stone moves upward, its speed reduces, so kinetic energy decreases.
22. Answer: B
At the highest point, speed is zero, so kinetic energy is minimum.
23. Answer: B
An electric fan converts electrical energy into mechanical energy.
24. Answer: B
A generator changes mechanical energy into electrical energy.
25. Answer: B
Efficiency shows how well a machine uses energy without waste.
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