Define electric energy its commerical units.

Explanation

The total energy used by an devices is obtained by multiplying the power and duration of the time when it is ON. Unit of the energy will be in joules. (or) watt second. Electrical energy is measured in kilowatt (kWh). 1kW is known as 1 unit of electrical energy. `(1kWh=1000 Wh = (1000 W) (3600 s), 1 kWh=3.6 xx10^(6)J)`.