Inductor
From Conservapedia
An inductor (also referred to as a "choke" or a "coil") is an electrical component used to store electrical energy, or filter high frequencies out of a signal.
They are usually constructed by winding insulated wire into a coil, which may or may not have a ferritic core to increase the inductance.
The "function" of an inductor may also be replaced with op-amp circuits for very small signals.
An inductor with two separate windings becomes a transformer - a device for changing or isolating alternating current voltage in circuits.
