Work, Energy, and Power - Class 11 MCQ Test

1. The SI unit of work is:

A) Joule
B) Newton
C) Watt
D) Meter

2. What is the work done when a force of 10 N displaces an object by 5 meters along the direction of force?

A) 50 Joule
B) 25 Joule
C) 10 Joule
D) 0 Joule

3. The SI unit of power is:

A) Joule
B) Watt
C) Newton
D) Ampere

4. Which of the following is the correct formula for work done?

A) Work = Force × Displacement × cos(θ)
B) Work = Force × Time
C) Work = Force × Mass
D) Work = Force × Speed

5. The unit of kinetic energy is:

A) Joule
B) Newton meter
C) Meter per second
D) Kilogram per meter

6. The kinetic energy of an object depends on:

A) Mass and velocity
B) Force and distance
C) Velocity and time
D) Mass and force

7. The formula for the potential energy of an object is:

A) PE = mgh
B) PE = mv²/2
C) PE = mg
D) PE = ½ mv²

8. The law of conservation of energy states that:

A) Energy can neither be created nor destroyed
B) Energy can be created but not destroyed
C) Energy can be destroyed but not created
D) Energy can be created and destroyed

9. Work done in lifting an object is converted to:

A) Potential energy
B) Kinetic energy
C) Heat energy
D) Mechanical energy

10. The energy stored in an object due to its motion is called:

A) Kinetic energy
B) Potential energy
C) Thermal energy
D) Chemical energy

11. The power required to do 100 Joules of work in 5 seconds is:

A) 20 Watt
B) 50 Watt
C) 100 Watt
D) 200 Watt

12. The work-energy theorem states that:

A) The work done on an object is equal to its change in kinetic energy
B) The work done on an object is equal to its change in potential energy
C) The work done on an object is zero
D) The work done on an object is constant

13. Which of the following does not change the kinetic energy of a body?

A) Changing velocity
B) Changing mass
C) Changing height
D) Changing direction

14. The unit of force is:

A) Newton
B) Joule
C) Watt
D) Meter

15. The formula for gravitational potential energy is:

A) mgh
B) 1/2 mv²
C) F×d
D) mv²

16. Energy possessed by an object due to its position or configuration is called:

A) Potential energy
B) Kinetic energy
C) Heat energy
D) Mechanical energy

17. What happens when work is done on an object?

A) The object gains energy
B) The object loses energy
C) The object's velocity decreases
D) The object's position changes

18. The power required to lift a body of mass 10 kg to a height of 5 m in 5 seconds is:

A) 10 W
B) 50 W
C) 100 W
D) 200 W

19. The energy possessed by an object due to its motion is called:

A) Kinetic energy
B) Potential energy
C) Heat energy
D) Mechanical energy

20. The rate of doing work is called:

A) Power
B) Energy
C) Work
D) Force