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An electric heater is rated 1500 W. How much energy does it use in 10 hours?

Q. 14.     An electric heater is rated 1500 W. How much energy does it use in 10 hours?

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The relation between energy and power is given by :

                                          Energy  =   Power \times  Time

Thus the energy used in 10 hours is :

                                              E\ =\ 1500\times 10\ =\ 15000\ Wh\ =\ 15\ KWh

Hence the energy used by the heater is  15 KWh.

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