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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A quarter horse power motor runs at a speed of 600 r.p.m. Assuming 40% efficiency, the work done by the motor in one rotation will be

Answer: (A)

Solution

Quarter H.P. = 746/4 = 186.5 W. At n = 600 rpm = 10 rev/s, time per revolution = 1/10 s. Energy input

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Question ID VK-153998