Inductance:

Inductance is the reverse to ac by temporarily storing a few of the electrical energy as a magnetic field. The components which do this are termed as inductors. Inductors frequently, though not always, consist of wire coils.

THE PROPERTY OF INDUCTANCE

Assume that you have a wire of 1 million (106) km long. What happens when you make this wire into a vast loop and connect its ends to the terminals of a battery? The current flows via the loop, and this generates a magnetic field. The field is small at first since current flows in only part of the loop. The magnetic flux rises over a period of a few seconds as the motion of charge carriers (mainly the electrons) makes its way approximately the loop. A certain amount of energy is stored in this magnetic field. The ability of the loop to store energy in this manner is the property of inductance, represented in equations by an italicized uppercase letter L.