JAC Class 11 Physics MCQ Chapter-5: Work, Energy, And Power

1. The commercial unit of energy is-

  • Watt
  • Joule
  • Kilowatt-hour
  • None of these
Answer
Kilowatt-hour

2. The product of force and displacement is called –

  • Energy
  • Momentum
  • Power
  • Work
Answer
Work

3. Work will be said not to be done if the force and displacement are –

  • parallel
  • acting in the opposite direction
  • perpendicular
  • None of these
Answer
acting in the opposite direction

4. Energy is-

  • the capacity for doing work
  • rate of doing work
  • change of work
  • None of these
Answer
the capacity for doing work

5. Potential energy of an object of mass ‘m’ at a height ‘h’ is –

  • 1/2mv²
  • m²gh
  • mgh
  • mg
Answer
mgh

6. The expression of kinetic energy is –

  • 1/2mv²
  • m²gh
  • mgh
  • mg
Answer
mgh

7. Out of the following, which is not the unit of energy –

  • Joule
  • Calorie
  • Kilo-Watt
  • Electron-Volt
Answer
Kilo-Watt

8. Joule is a unit of –

  • Work and Power
  • Power and Energy
  • Force
  • Work and Energy.
Answer
Work and Energy.

9. Area under the Force-Displacement curve represents –

  • Velocity
  • Impulse
  • Acceleration
  • Work done
Answer
Work done

10. The momentum of a body increased by 25%, then kinetic energy is increased by about –

  • 25 %
  • 56 %
  • 5 %
  • 38 %
Answer
56 %

11. The rate of doing work is called –

  • energy
  • force
  • power
  • pressure
Answer
power

12. What will be the kinetic energy of a substance when its velocity is doubled?

  • Double
  • Four times
  • Half
  • One-fourth
Answer
Four times

13. What will be the kinetic energy of a body when its velocity is halved?

  • Double
  • Four times
  • Half
  • One-fourth
Answer
One-fourth

14. Watt is the unit of the following –

  • Work
  • Power
  • Energy
  • None of these
Answer
Power

15. If the velocity of a body becomes double then its kinetic energy becomes –

  • Double
  • Four times
  • Half
  • One-fourth
Answer
Four times

These JAC MCQs for class 11 Physics will help students prepare for the board exam. For more study materials, such as solutions, model papers, syllabus, MCQ Questions, and the latest updates on the JAC Board, please visit our website at JACBoardSolutions.com.

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