Know that a current-carrying coil in a magnetic field may experience a turning effect and that the turning effect is increased by increasing: (a) the number of turns on the coil (b) the current (c) the strength of the magnetic field

Know that the direction of an induced e.m.f. opposes the change causing it

Describe a simple form of a.c. generator (rotating coil or rotating magnet) and the use of slip rings and brushes where needed