Power NEET Questions

Physics - Work, Energy, and Power

Power MCQ Questions


13.
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
14.
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
šŸ˜‘ View Answer Rough Work Error
ANSWER :
C. 60000 J
15.
A car of mass 1000 kg accelerates uniformly from 5 m/s to 25 m/s in 10 seconds. The average power developed by the engine during this time is:

NEET - 2018

A.
20 kW
B.
25 kW
C.
30 kW
D.
35 kW
šŸ˜‘ View Answer Rough Work Error
ANSWER :
B. 25 kW
16.
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
šŸ˜‘ View Answer Rough Work Error
ANSWER :
B. 20 W
17.
A vehicle of mass 1000 kg accelerates from rest to 20 m/s in 10 s. Average power delivered by engine (ignore friction) is:
A.
10000 W
B.
20000 W
C.
40000 W
D.
2000 W
šŸ˜‘ View Answer Rough Work Error
ANSWER :
B. 20000 W
18.
An elevator (max load 1800 kg) moves upward at constant 2 m/s, friction = 4000 N. Minimum motor power is: (g = 10 m/sĀ²) [NCERT Ex 5.10]
A.
18000 W
B.
36000 W
C.
44000 W
D.
8000 W
šŸ˜‘ View Answer Rough Work Error
ANSWER :
C. 44000 W