Physics Quiz | Work, Energy and Power | General Knowledge

Physics Quiz
Work, Energy and Power

1. As the object gains speed, its G.P.E (Gravitational Potential Energy)

A. increases
B. remains constant
C. decreases
D. varies depending on altitude

... Answer is D.
varies depending on altitude

2. If energy loss is zero, then decrease in G.P.E is equal to

A. decreases in kinetic energy
B. gain in kinetic energy
C. constant kinetic energy
D. zero kinetic energy

... Answer is B.
gain in kinetic energy

3. What is the average power of all activities of our body?

A. 111W
B. 113W
C. 116W
D. 120W

... Answer is C.
116W

4. What is energy that object possesses due to its position called?

A. kinetic energy
B. mechanical energy
C. potential energy
D. chemical energy

... Answer is C.
potential energy

5. Change in G.P.E can be written as

A. mgh
B. mh
C. mg
D. gh

... Answer is A.
mgh

6. Efficiency of a car engine is only about

A. 10%
B. 20%
C. 30%
D. 80%

... Answer is B.
20%

7. Work is defined as

A. F × S
B. F × a
C. m × a
D. F × m

... Answer is A.
F × S

8. How much energy is transferred to stone of weight 10 N falling from top of 250 m high cliff?

A. 25000 J
B. 250000 J
C. 2500 J
D. 250 J

... Answer is C.
2500 J

9. How much work is done if force of 1 N moves an object through 1 m?

A. 2 J
B. 1 J
C. 3 J
D. 4 J

... Answer is B.
1 J

10. What are SI units for energy and work?

A. joules and kg
B. joules and meter
C. joules and newton
D. joules

... Answer is D.
joules

11. If the ball is thrown upwards, the energy changings are

A. K.E changes to G.P.E
B. G.P.E changes to K.E
C. K.E changes to mechanical energy
D. mechanical energy changes to K.E

... Answer is A.
K.E changes to G.P.E

12. What is 1 W equal to?

A. 10 J s^-1 
B. 1 J s
C. 1 J s^-1
D. 100 J s 

... Answer is C.
1 J s^-1

13. Work done by force of gravity on a satellite of 500 N at height is

A. 0 J
B. 1 J
C. 2 J
D. 3 J

... Answer is A.
0 J

14. What is the rate of doing work called?

A. power
B. energy
C. velocity
D. force

... Answer is A.
power

15. A weight-lifter raises weights with a mass of 200 kg from the ground to a height of 1.5 m, the increase in their G.P.E is

A. 1962 J
B. 2940 J
C. 800 J
D. 1000 J

... Answer is B.
2940 J