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
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