1. The commercial unit of energy is-

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

2. The product of force and displacement is called –

- Energy
- Momentum
- Power
- 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

4. Energy is-

- the capacity for doing work
- rate of doing work
- change of work
- None of these

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

- 1/2mv²
- m²gh
- mgh
- mg

6. The expression of kinetic energy is –

- 1/2mv²
- m²gh
- mgh
- mg

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

- Joule
- Calorie
- Kilo-Watt
- Electron-Volt

8. Joule is a unit of –

- Work and Power
- Power and Energy
- Force
- Work and Energy.

9. Area under the Force-Displacement curve represents –

- Velocity
- Impulse
- Acceleration
- Work done

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

- 25 %
- 56 %
- 5 %
- 38 %

11. The rate of doing work is called –

- energy
- force
- power
- pressure

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

- Double
- Four times
- Half
- One-fourth

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

- Double
- Four times
- Half
- One-fourth

14. Watt is the unit of the following –

- Work
- Power
- Energy
- None of these

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

- Double
- Four times
- Half
- One-fourth

thanks pray kijeye kein mera accha no aa jaye

bhagwan agar saab ka aase hi sunega to koe kisi ka kadar nhi karega.or na koe mehnat karega.

bhagwan agar saab ka aase hi sunega to koe kisi ka kadar nhi karega.or na koe mehnat karega.