What is the unit of measurement for reactance in AC circuits?

The unit of measurement for reactance in alternating current (AC) circuits is Ohms. Reactance is a measure of how much an inductor or capacitor resists the flow of AC current due to its impedance at various frequencies. This resistance to change in current flow is crucial in AC circuits and is represented in Ohms, just like resistance is in direct current (DC) circuits.

Reactance can be inductive, which is the opposition to the change of current through an inductor, or capacitive, representing the opposition to change of voltage across a capacitor. Both forms of reactance affect the phase relationship between voltage and current in AC circuits and are calculated based on frequency and the reactive components' values.

The other choices do not pertain to the measurement of reactance: Farads measure capacitance, Henry measures inductance, and Volts measure electrical potential. Each of these units serves a specific purpose in electrical theory, but only Ohms are used to quantify reactance.