1.

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 same time, power of motor has to be increased: 1. 16 times 2. 4 times 3. 8 times 4. 2 times

Answer»

3. 8 times 

p ∝ (v)3

 If velocity is doubled. Power will become 8 times.



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