Spark image

Moving a magnet through a coil

An emf will be induced in a coil if a permanent magnet is moved towards or away from it. The direction of the induced emf depends on the direction of motion of the magnet.

The faster the magnet moves the larger the emf induced in the coil. If the magnet is brought to rest at any time the emf in the coil falls to zero.
© Keith Gibbs/John Bourne 2008