## Electric Power

The rate of loss of energy in an electrical circuit is called electrical power. It is denoted by’P’

units of power = joule/sec, watt, horse power

1 watt = 1 joule/sec, 1 HP = 746 watt

unit of electrical energy = watt second, kilowatt hour

1 kilowatt hour (kwh) = 3.6 × 10^{6} Joule