Power NEET Questions

Physics - Work, Energy, and Power
Power

Power MCQ Questions


7.
One horse-power (hp) is equal to:
A.
1000 W
B.
550 W
C.
746 W
D.
373 W
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ANSWER :
C. 746 W
8.
Power is a:
A.
Vector quantity, direction same as force
B.
Vector quantity, direction same as velocity
C.
Scalar quantity that can be positive, negative, or zero
D.
Scalar quantity, always positive
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ANSWER :
C. Scalar quantity that can be positive, negative, or zero
9.
A man does 1500 J of work in 30 s. His average power is:
A.
50 W
B.
45000 W
C.
0.02 W
D.
500 W
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ANSWER :
A. 50 W
10.
A pump lifts 200 kg of water per minute to height 5 m. Power of pump is: (g = 10 m/sĀ²)
A.
1666.7 W
B.
100 W
C.
166.7 W
D.
10000 W
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ANSWER :
C. 166.7 W
11.
A motor delivers power of 500 W for 2 minutes. Total work done by motor is:
A.
250 J
B.
1000 J
C.
60000 J
D.
6000 J
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ANSWER :
C. 60000 J
12.
A force F = 10 N acts on a body moving with velocity v = 4 m/s. The angle between F and v is 60Ā°. Instantaneous power is:
A.
40 W
B.
20 W
C.
34.6 W
D.
8.66 W
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ANSWER :
B. 20 W
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