Power NEET Questions

Physics - Work, Energy, and Power

Power MCQ Questions


1.
The SI unit of power is:
A.
Joule
B.
Watt
C.
Erg
D.
Newton
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ANSWER :
B. Watt
2.
A machine does 1000 J of work in 2 seconds. Its power output is:
A.
500 W
B.
1000 W
C.
2000 W
D.
250 W
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ANSWER :
A. 500 W
3.
A car accelerates from rest to 20m/s in 10s. If its mass is 1000kg, what is the average power developed by the engine?
A.
20 kW
B.
10 kW
C.
15 kW
D.
30 kW
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ANSWER :
B. 10 kW
4.
A crane lifts a 500kg object to a height of 10m in 5s. The power required is (Take g=10m/s2)
A.
5000 W
B.
1000 W
C.
2000 W
D.
3000 W
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ANSWER :
A. 5000 W
5.
A pump is used to lift 500 kg of water from a depth of 80 meters in 10 minutes. The power required by the pump is (take g = 10 m/sĀ²):

NEET - 2020

A.
500 W
B.
600 W
C.
700 W
D.
800 W
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ANSWER :
A. 500 W
6.
A truck moves up an inclined plane with constant velocity. The power required to do this depends on:
A.
Mass
B.
Velocity
C.
Angle of incline
D.
All of these
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ANSWER :
D. All of these