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

Answers (1)

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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