Question

20.) Find the energy in kW h consumed in 10 hours by four
devices of power 500 W each.
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Answer 1

Answer:

0.05kW h

Explanation:

500W=0.5kW

energy=power/time

=0.5/10

=0.05kW h

Answer 2

Answer:

hi mates her the answer

Explanation:

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

Therefore, energy consumed=power×time

energy consumed=0.50×10

energy consumed =5 kWh

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

=4×5 kWh

=20 kWh

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