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Question 14

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

Answer

Power of the heater, P = 1500 W = 1.5 kW

Time taken, T = 10 h

Energy consumed by an electric heater can be obtained with the help of the expression,

Power = Energy consumed / time

Therefore, Energy consumed = Power × Time

= 1.5 × 10 = 15 kWh

Hence, the energy consumed by the heater in 10 h is 15 kWh.

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