Question

If an appliance of power P watt is used for time
t hour, how much electrical energy is consumed
in kWh ?
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Answer 1

Answer:

Given.

power=P

time=t

As we know that energy =work done

To find the energy i.e work

power=work/time

p=work/t.(substitution of values given above)

pt=work

.Therefore the energy used by appliance is pt.

I think question is something wrong ,in this case energy can't be calculated into kwh.

you can ask the same question with correct values.