Inductance measures magnetic flux linkage per current and gives the self-induced electromotive force .
For a circuit whose flux linkage is proportional to its current, the self-inductance is the coefficient in . Faraday's law gives the induced electromotive force when is constant. In series with a resistance and a constant applied electromotive force, the current obeys , with time constant .
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Inductance is a property of an electrical circuit that quantifies the ability of a component, typically a coil of wire (known as an inductor), to store energy in a magnetic field when an electric current passes through it. It is defined as the ratio of the induced electromotive force (EMF) in the coil to the rate of change of current flowing through it.