Question

An electric heater is rated 1500 W. How much energy it consume in 12 hours?​

Answer 1

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Energy consumed by an electric heater can be obtained with the help of the expression, P= W/T Where, Power rating of the heater, P= 1500 W = 1.5 kW Time for which the heater has operated, T= 10 h Work done = Energy consumed by the heater Therefore, energy consumed = Power — Time = 1.5 — 10 = 15 kWh Hence, the energy consumed by the heater in 10 h is 15 kWh.

Answer 2

Explanation:

Power=1500W=1500/1000=1.5kW

time=t=10hours.

Energy=Power x t

=1.5 X 12

=18kWh

Hence , the energy consumed by the heater in 12h is 18kwH