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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A pump motor is used to deliver water at a certain rate from a given pipe. To obtain twice as much water from the same pipe in the same time, power of the motor has to be increased to

Answer: (C)

Solution

Power delivered to the flowing water, P = ½ρAv³, so P ∝ v³. To double the flow rate (and

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Question ID VK-153988