Inductor — a passive electrical component, consisting of a coil with wire, which is designed to use the relationship between magnetism and electricity as a result of the passage of electric current through the coil
Inductor Symbol
![](https://www.electronics-tutorials.ws/inductor/ind1.gif)
Inductors resist or oppose changes of current. This ability of an inductor to resist changes in current and which also relates current, with its magnetic flux linkage, as a constant of proportionality is called Inductance which is given the symbol L with units of Henry, (H) after Joseph Henry.
Inductance coils are used in the construction of various circuits with frequency-dependent properties, in particular, filters, feedback circuits, oscillatory circuits. Two or more inductively coupled coils form a transformer. They are also used for radio communication — the reception of electromagnetic waves, rarely — for the emission of waves.