Which unit is used to measure inductance?

Inductance is a property of an electrical component that quantifies the ability of that component, typically an inductor, to store energy in a magnetic field when electric current flows through it. The unit of measurement for inductance is the henry, named after the American scientist Joseph Henry. One henry is defined as the amount of inductance in a circuit when a change in current of one ampere per second induces an electromotive force of one volt.

Understanding this, the other choices relate to different electrical properties: volts measure electric potential, ohms measure resistance, and amperes measure current. Each of these units serves a distinct purpose in the context of electrical principles, but they do not define the specific characteristic of inductance. Therefore, the henry is the unit specifically designated for measuring inductance, making it the correct answer.