Question

calculate electrical energy consumed by electric heater if it is working for 2 hours and its power is thousand watts

Answer 1

Time taken=2h
Power=1000W=1 KW
Energy=?
W.K.T.
Power=energy/time taken
1KW=energy/2
energy=2kWh
I hope it can help you!

Answer 2

Given that,

Power of electric heater, P = 1000 W = 1 kW

Time for working, t = 2 hours

To find,

The electrical energy consumed by electric heater.

Solution,

Power of an electric heater is given by electrical energy consumed divided by time. Let E is electrical energy consumed. So,

$P=\dfrac{E}{t}\\\\E=P\times t\\\\E=1\ kW\times 2\ h\\\\E=2\ kWh$

So, the electrical energy consumed by electric heater is 2 kWh.

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