Inductance is a fundamental concept in physics and electrical engineering that describes the ability of a component or circuit to oppose changes in the electric current flowing through it. It is a property that characterizes how an electrical circuit stores energy in the form of a magnetic field when current flows through it.
Inductance is typically denoted by the symbol "L" and is measured in units called "henrys" (symbol: H). One henry (1 H) of inductance is defined as the amount of inductance that produces an electromotive force (EMF) of 1 volt when the current through the inductor changes at a rate of 1 ampere per second. In other words, an inductor has an inductance of 1 henry if a change in current of 1 ampere per second induces a voltage of 1 volt across its terminals. The henry is a relatively large unit, and in practical applications, smaller units like millihenrys (mH) or microhenrys (ยตH) are often used.