Household Electricity — Question 9

Power = P watt or P x 10^-3 kW

time = t hour

Power = $\dfrac{\text{Energy}}{\text{Time}}$

Energy = Power x time
= P x 10^-3 kW x t h
= P x t x 10^-3 kWh

Electrical energy consumed = Pt x 10^-3 kWh.