Question

A pump of power 1500W is used for 5 mins the energy supplied by the pump is

Answer 1

E=P*T = (1500*5*60 )Ws= 450000 Ws

Answer 2

Given:

A pump of power 1500W is used for 5 minutes.

To find:

Energy delivered by the pump.

Calculation:

Power is often defined as the instantaneous rate of doing work.

In other words , the net work done by a engine can be calculated by multiplication of the power and the time for which the engine operates.

• For calculating the work in joule , power unit must be watt and time unit must be seconds.

$\rm \therefore \: power = \dfrac{work}{time}$

$\rm = > \: work = power \times time$

$\rm = > \: work = 1500 \times (5 \times 60)$

$\rm = > \: work = 1500 \times 300$

$\rm = > \: work = 45 \times {10}^{4} \: joule$

$\rm = > \: work = 450\: kilojoule$

So, the work done by the pump is 450 kJ.