Find the energy in kWh consumed in 10 hours by four devices of power 500 W each.

Given,

Power of one device = 500 W

Power of four devices = 500 × 4

= 2000 W

= kW

= 2 kW

Time = 10 h

We know that,

Power =

2 kW =

Energy consumed = 2 × 10

= 20 kWh