What unit is used to measure inductance?

Inductance is a property of an electrical component—usually a coil of wire—where it opposes changes in current. The standard unit of measurement for inductance is the henry, named after the American engineer Joseph Henry. One henry is defined as the amount of inductance that induces one volt of electromotive force (EMF) when the current through the inductor changes at a rate of one ampere per second. This definition highlights the relationship between inductance and the flow of electric current, making the henry the appropriate unit for measuring this property.

Other options represent different electrical concepts: ohm is used for measuring resistance, farad is the unit of capacitance, and volt measures electric potential difference. Each of these units relates to different aspects of electrical circuits, but only the henry defines the concept of inductance effectively. This distinction is crucial for understanding circuit behavior, especially in alternating current (AC) systems where inductance plays a significant role.