Question

find the energy in KW h consumed in 10 hours by four devices of power 500 volt each​

Answer 1

Find the energy in kW h consumed in 10 hours by four devices of power 500 W each. Hence, the energy consumed by four equal rating devices in 10 h will be 4 — 5 kWh = 20 kWh = 20 Units.

Answer 2

 $\huge\bf\mathfrak\green{An}\red{sw}\blue{er}$

Energy consumed by an electric device can be obtained with the help of the expression for power,

P = W/T

Where,

Power rating of the device, P= 500 W = 0.50 kW

Time for which the device runs, T= 10 h

Work done = Energy consumed by the device

Therefore, energy consumed = Power —Time

= 0.50 — 10 = 5 kWh

Hence, the energy consumed by four equal rating devices in 10 h will be 4 — 5 kWh = 20 kWh = 20 Units.