Which unit is used to describe electrical power?

The unit used to describe electrical power is Watts. Power in an electrical context is a measure of how quickly electrical work is done or how much electrical energy is converted to heat or mechanical energy per unit time.

The definition of a Watt is one joule per second, which indicates the rate of energy transfer. In electrical circuits, power can also be calculated using the formula P = IV, where P represents power (in Watts), I is current (in Amperes), and V is voltage (in Volts). This relationship highlights that Watts quantify the amount of energy used or produced over time, fitting the context of electrical systems and performance.

Other options represent different electrical properties: Volts measure electrical potential or electromotive force, Amperes measure electric current flow, and Coulombs quantify electric charge. While these units are critical in the field of electricity and are related to power calculations, they do not define power itself, which firmly establishes why Watts is the correct choice for describing electrical power.