Educator

Electromagnetic Induction

• Induced EMF: If a magnet and a coil move relative to each other, a potential difference, called electromotive force, is induced in the loop, and an electric current will exist in the loop, even though no battery is connected.
• Motional EMF: If a conducting rod, of length L, is moved with a constant velocity v, perpendicular to its length, in a uniform magnetic field B, an emf will be induced in the rod, given by emf = L B v.