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Question: Answered & Verified by Expert
A pump motor is used to deliver water at a certain rate from a given pipe. To obtain n times water from the same pipe in the same time the amount by which the power of the motor should be increased
PhysicsWork Power EnergyNEET
Options:
  • A n1/2
  • B n2
  • C n3
  • D n
Solution:
2681 Upvotes Verified Answer
The correct answer is: n3
The volume delivered per second =  Av

Mass delivered per second = Avd

Momentum delivered per second = Av2d = Force

Power = Force × Velocity = Av3d

i.e. Power v3

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