Electromagnetic induction is the production of an electromotive force that results from the movement of a conductor through a magnetic field. An electromotive force also results from the changing of magnetic flux in a closed loop circuit.

Magnetic fields and electric fields are both components of an electromagnetic wave. In such a wave the electrical and magnetic fields potentiate each other.

Within most electrical circuits, an electromotive force, or EMF, is produced by a source of potential difference within the circuit. The source of potential difference is usually some form of battery or capacitor. Electromotive force drives current flow between areas of differing voltages in a conducting material. The movement of charges or current flow is directly proportional to the EMF and inversely related to the resistance of the conducting material.

An EMF that causes current within a circuit can, however, be created from an outside...