Inductance is a fundamental property of an electrical circuit that quantifies its ability to store electromagnetic energy when an electric current flows through it. It is the property that opposes any change in the flow of current and is primarily associated with the generation of a magnetic field in response to a changing current. Inductance is typically denoted by the letter "L" and is measured in units called "henries" (symbol: H).
One henry (1 H) of inductance is defined as the amount of inductance that induces an electromotive force (emf) of one volt when the current through the inductor changes at a rate of one ampere per second. In other words, an inductor has an inductance of 1 H if a change in current of 1 A/s induces a voltage of 1 V across it. The relationship between inductance, current, and voltage is described by the following formula:
=
V=L
dt
di
โ
Where:
V is the induced voltage across the inductor,
L is the inductance,
di is the change in current,
dt is the change in time.
Inductance is an essential parameter in the design and analysis of electrical circuits, especially in applications involving alternating current (AC), transformers, motors, and various electronic components like inductors and solenoids.