Electrical power is measured in which of the following units?

Electrical power is the rate at which electrical energy is used, converted, or generated in a circuit. In the standard metric system, this rate of doing work is measured in Watts. Power is calculated by multiplying the electrical pressure (Volts) by the flow rate of the electrons (Amperes), which is expressed in Ohm's Law as P = E x I. It is important not to confuse power with energy. 'Watt-hours' is a measure of total energy consumed over a period of time, similar to the capacity of a battery. 'Watts' refers to the instantaneous rate of power being used at any given second.