What is the unit of reactive power?

Reactive power is measured in volt-amperes reactive, commonly abbreviated as VARs. This unit represents the power that alternates between the source and the reactive components of an electrical system, such as inductors and capacitors. Unlike active power, which is measured in watts and does useful work, reactive power does not contribute to energy consumption but is essential for maintaining voltage levels that allow active power to flow effectively in an AC system.

Other units mentioned, like watts, measure active power; ohms are used to express resistance in electrical circuits; and joules quantify energy, not power. Therefore, volt-amperes reactive is the appropriate and correct unit for reactive power, as it specifically relates to the management of the phase difference between voltage and current in AC systems.