What is the unit of electrical power?

The unit of electrical power is measured in Watts (W). Power in an electrical context is defined as the rate at which electrical energy is transferred or converted. One Watt is defined as one Joule per second, indicating how much energy is used or produced over time.

In the context of the other options, a Joule is a unit of energy, which represents the work done when a current of one ampere passes through a resistance of one ohm for one second. An Ohm is a measure of electrical resistance and indicates how much opposition there is to the flow of current in a circuit. A Volt is a measurement of electrical potential difference or voltage, essentially describing how much potential energy there is to move charges in a circuit. Each of these units plays a critical role in understanding electrical systems, but they each describe different electrical properties rather than power itself.