Editing Electromagnetic coil (section)

===Inductors===
{{main|Inductor}}
[[Inductor]]s or reactors are coils which generate a magnetic field which interacts with the coil itself, to induce a back EMF which opposes changes in current through the coil. Inductors are used as [[circuit element]]s in electrical circuits, to temporarily store energy or resist changes in current. A few types:

:*Tank coil - an inductor used in a [[tuned circuit]]
:*[[Choke (electronics)|Choke]] - an inductor used to block high frequency AC while allowing through low frequency AC or DC.
:*[[Loading coil]] - an inductor used to add inductance to an antenna, to make it resonant, or to a cable to prevent distortion of signals.
:*[[Transformer types#Variometer and variocoupler|Variometer]] - an adjustable inductor consisting of two coils in series, an outer stationary coil and a second one inside it which can be rotated so their magnetic axes are in the same direction or opposed.
:*[[Flyback transformer]] - Although called a transformer, this is actually an inductor which serves to store energy in [[switching power supply|switching power supplies]] and horizontal deflection circuits for [[vathode-ray tube|CRT]] televisions and monitors
:*[[Saturable reactor]] - an iron-core inductor used to control AC power by varying the saturation of the core using a DC control voltage in an auxiliary winding.
:*[[Electrical ballast|Inductive ballast]] - an inductor used in [[gas-discharge lamp]] circuits, such as [[fluorescent lamp]]s, to limit the current through the lamp.
{{Clear}}