Question

Find the energy in kW h consumed in 10 hours by three devices of power 500 W each.​

Answer 1

Answer:

Given parameters

Power rating of the device (P) = 500 W = 0.50 kW

Time for which the device runs (T) = 10 h

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

P = W/T

Work done = energy consumed by the device

∴ Energy consumed = Power × Time

Energy consumed = 0.50 × 10

Energy consumed = 5 kWh

Hence, the energy consumed by four equal rating devices in 10 h will be

⇒ 4 × 5 kWh

= 20 kWh

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Answer 2

Answer:

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