Electric power is the electrical work done for in time. Power=work done/time taken P=w/t Unit of power. The SI unit of electric power is what denoted by letter W. The power of 1 watt is rate of working of 1 joule per second. 1watt=1joule/1second
Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries.