The property of an inductor to get the voltage induced by the change of current flow, is defined as Inductance. Inductance is the ratio of voltage to the rate of change of current.

The rate of change of current produces change in the magnetic field, which induces an EMF in opposite direction to the voltage source. This property of induction of EMF is called as the Inductance.

The formula for inductance is

Inductance=volatgerateofchangeofcurrentInductance=volatgerateofchangeofcurrent

Units −

·        The unit of Inductance is Henry. It is indicated by L.

·        The inductors are mostly available in mH (milli Henry) and μH (micro Henry).

A coil is said to have an inductance of one Henry when an EMF of one voltis self-induced in the coil where the current flowing changed at a rate of one ampere per second.