This quiz is made for 9th-grade students and here we have a variety of questions. Work, energy & power are the most generally used terms in Physics. Work is a common term that we use in our daily life and it plays a very crucial role. As we all know force changes the motion & momentum. But during this course, the body on which the force is applied also moves through some distance. The quantity which measures the rate of work is done is called power.
1. What is the smallest unit of power?
A. Kilowatt
B. Watt
C. Horse power
D. Milliwatt
2. Joule is a unit of ...
A. Work
B. Power
C. Energy
D. Momentum
3. The commercial unit of energy is ...
A. Watt
B. Kilowatt
C. Watt hour
D. Kilowatt hour
4. The energy possessed by a body due to its position is called ...
A. Kinetic Energy
B. Potential Energy
C. Mechanical Energy
D. Electrical Energy
5. In 1 minute how much energy does 100 W electric bulb transfers?
A. 100 J
B. 600 J
C. 3600 J
D. 6000 J
6. What happens to the body on which work is done?
A. It loses energy
B. It gains energy
C. No change in the energy
D. First it loses then it gain
7. On an object, the work done does not depend upon ....
A. Displacement
B. Angle between force and displacement
C. Force applied
D. Initial velocity of an object
8. A radio set of 60 watts runs for 50 hours. How many units of electrical energy are consumed in kWh?
A. 2 kWh
B. 3 kWh
C. 4 kWh
D. 2.5 kWh
9. When an object falls freely towards the ground, then its total energy?
A. Increases
B. Decreases
C. Remains constant
D. First increases then decreases
10. By how much does kinetic energy increase if the momentum is increased by 20%?
A. 66%
B. 77%
C. 44%
D. None of these
Drop your comment here...
