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
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
$16$ times
$4$ times
$8 $ times
$2$ times
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
Power of a pump$ = \frac{1}{2}\rho A{v^3}$
To get twice amount of water from same pipe v has to be made twice. So power is to be made $8$ times.