Faraday's Law of Induction

     Given a loop of wire in a magnetic field, Faraday's Law of Induction states that the induced EMF is given by:

Equation for induced EMF

with the magnetic flux through the loop in the magnetic field 'B' in a closed surface at a time 't'. The sign of the EMF is determined by Lenz's Law, and this is valid for both a stationary and a moving wire.

     The Lorentz Force Law, with Maxwell's Equations, can be used to derive Faraday's Law of Induction and the other way around.

Electromotive Force | EMF

     Whether an EMF is motional or not, it can be described using the same equation (ie. Faraday's Law of Induction). The electric and magnetic fields are two parts of the same electromagnetic field.

In Real Life

     The Lorentz Force is known to occur in (but not limited to) the following devices: