An electric heater is rated 1500 W.
Question.
An electric heater is rated 1500 W. How much energy does it use in 10 hours ?
An electric heater is rated 1500 W. How much energy does it use in 10 hours ?
Solution:
Energy used by heater = Power × time
$=1500 \mathrm{~W} \times 10 \mathrm{~h}=\frac{1500}{1000} \mathrm{~kW} \times 10 \mathrm{~h}=15 \mathrm{kWh}$
Energy used by heater = Power × time
$=1500 \mathrm{~W} \times 10 \mathrm{~h}=\frac{1500}{1000} \mathrm{~kW} \times 10 \mathrm{~h}=15 \mathrm{kWh}$