In electromagnetism and electronics, inductance is the property of a conductor by which a change in current in the conductor "induces" a voltage in both the conductor itself and in any nearby conductors. This effect derives from two fundamental observations of physics: First, that a steady current creates a steady magnetic field and second, that a time-varying magnetic field induces a voltage in a nearby conductor. From Lenz's law, in an electric circuit, a changing electric current through a circuit that has inductance induces a proportional voltage which opposes the change in current. The varying field in this circuit may also induce an e.m.f. in a neighbouring circuit. The term 'inductance' was coined by Oliver Heaviside in February 1886. It is customary to use the symbol L for inductance, in honour of the physicist Heinrich Lenz. In the SI system the unit of inductance is the henry, named in honor of the scientist who discovered inductance, Joseph Henry. To add inductance to a circuit, electrical or electronic components called inductors are used, typically consisting of coils of wire to concentrate the magnetic field and so that the magnetic field is linked into the circuit more than once. Wikipedia [ - ]

In electromagnetism and electronics, inductance is the property of a conductor by which a change... [ + ]