Description

A transformer is a device that allows AC voltage to be increased or decreased to the required value for transmission or for specific uses. It does this by transfering electrical energy from one circuit to another through inductively coupled conductors. The inductively coupled conductors are the windings or coils wound around a ferromagnetic core within the transformer. The alternating current in the first or primary winding creates a varying magnetic flux in the core and thus a varying magnetic field through the secondary winding. This varying magnetic field induces a varying electromotive force (EMF), or "voltage", in the secondary winding.