Editing Inductor (section)

=== Voltage step response ===
When a [[Step function|voltage step]] is applied to an inductor:
* In the short-time limit, since the current cannot change instantaneously, the initial current is zero. The equivalent circuit of an inductor immediately after the step is applied is an [[Electrical circuit|open circuit]].
* As time passes, the current increases at a constant rate with time until the inductor starts to saturate.
* In the long-time limit, the transient response of the inductor will die out, the magnetic flux through the inductor will become constant, so no voltage would be induced between the terminals of the inductor. Therefore, assuming the resistance of the windings is negligible, the equivalent circuit of an inductor a long time after the step is applied is a [[short circuit]].