CG Vyapam Science MCQ Chapter Wise For Prayogshala Pricharak

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Chapter 12: Work and Energy – Important MCQs

1. Work is said to be done when:
A. There is force but no displacement
B. There is displacement but no force
C. Force and displacement both occur in the same direction
D. No energy is used
✔️ Answer: C. Force and displacement both occur in the same direction


2. The SI unit of work is:
A. Watt
B. Joule
C. Newton
D. Pascal
✔️ Answer: B. Joule


3. One joule of work is done when:
A. 1 kg mass moves 1 m
B. 1 N force moves an object 1 m
C. 1 N force is applied for 1 second
D. 1 m/s velocity is reached
✔️ Answer: B. 1 N force moves an object 1 m


4. When work is done on an object, energy is:
A. Destroyed
B. Created
C. Transferred
D. Reduced
✔️ Answer: C. Transferred


5. The energy possessed by a body due to its motion is:
A. Potential energy
B. Chemical energy
C. Kinetic energy
D. Mechanical energy
✔️ Answer: C. Kinetic energy


6. The energy stored in a stretched or compressed spring is:
A. Kinetic energy
B. Sound energy
C. Chemical energy
D. Potential energy
✔️ Answer: D. Potential energy


7. The formula for kinetic energy is:
A. ½ mv
B. mv²
C. ½ mv²
D. mgh
✔️ Answer: C. ½ mv²


8. Power is defined as:
A. Work × Time
B. Work / Time
C. Force × Distance
D. Force / Distance
✔️ Answer: B. Work / Time


9. The commercial unit of energy is:
A. Joule
B. Watt
C. Kilowatt
D. Kilowatt-hour
✔️ Answer: D. Kilowatt-hour


10. A body of mass 10 kg is lifted to a height of 5 meters. (Take g = 9.8 m/s²). The potential energy gained is:
A. 50 J
B. 490 J
C. 98 J
D. 500 J
✔️ Answer: B. 490 J
(PE = mgh = 10 × 9.8 × 5 = 490 J)


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Manish Pandey
Manish Pandey

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