Power — JEE Main Physics MCQs with Solutions
Free JEE Main Physics Power MCQs with step-by-step solutions (2 questions). Part of Work, Power and Energy. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Power · easy · numerical
A 60 kg person climbs stairs of total height 3 m in 6 s. The average power developed is:
A. 30 W
B. 300 W ✓ Correct
C. 600 W
D. 180 W
Solution: P = mgh/t = 60×10×3/6 = 300 W.
Q2 — Power · medium · numerical
A 2 kW motor pump lifts water to a height of 20 m. The mass of water raised per second is:
A. 2 kg
B. 100 kg
C. 20 kg
D. 10 kg ✓ Correct
Solution: P = (dm/dt)gh ⇒ dm/dt = 2000/(10×20) = 10 kg/s.