TRW UTC Transformer VIC-8 Adjustable Variable .12Hy to .38Hy, 210mH, 210mHY Inductor, Coil, Choke

An inductor, also called a coil, choke, or reactor, is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. An inductor typically consists of an insulated wire wound into a coil. When the current flowing through the coil changes, the time-varying magnetic field induces an electromotive force (emf) (voltage) in the conductor.