A transformer is an electrical device that transfers electrical energy between two or more circuits
through electromagnetic induction. Electromagnetic induction produces an electromotive force within a
conductor which is exposed to time varying magnetic fields. Transformers are used to increase or
decrease the alternating voltages in electric power applications.
A varying current in the transformer's primary winding creates a varying magnetic flux in the
transformer core and a varying field impinging on the transformer's secondary winding. This
varying magnetic field at the secondary winding induces a varying electromotive force (EMF) or
voltage in the secondary winding due to electromagnetic induction. Making use of Faraday's Law in
conjunction with high magnetic permeability core properties,