An electric heater is rated 1500 W. How much energy does it use in 10 hours?
Energy consumed by an electric heater can be obtained with the help ofthe expression,
P= W / T
Where,
Power rating of the heater, P= 1500 W = 1.5 kW
Timefor which the heater has operated, T= 10 h
Work done = Energy consumed by the heater
Therefore, energy consumed = Power x Time
= 1.5 x 10 = 15 kWh
Hence, the energy consumed by the heater in 10 h is 15 kWh.
