# Self-Inductance (L)

An electric current I flowing around a circuit produces a magnetic field and, hence, a magnetic flux through each turn of the circuit.Î» = NÏ•

Also, if the medium surrounding the circuit is linear then Î»

*Î±**I*or, Î» =*LI*where*L*is a constant, known as*inductance*of the circuit.

# Inductor

An inductor is a passive electrical device employed in electrical circuits for its property of inductance. Physically, the inductance L is a measure of an inductorâ€™s â€˜resistanceâ€™ to the change of current; the larger the value of L, the lower the rate of change of current.# Coupled Inductor

L
L
L

_{11}= Self-inductance of the inductor 1_{22}= Self-inductance of the inductor 2_{12}= L_{21}â€” the mutual inductance associated with both inductors# Mutual Inductance (M)

Mutual inductance is the ability of one inductor to induce an emf across another inductor placed very close to it.