AQA GCSE Physics · 8463
Specification 4.7.2.3, 4.7.3.2 · Paper 2
Revise: Electric motorsTwo stationary brushes press against its two halves, carrying current from the supply into and out of the coil. As the coil passes the vertical position, each half-ring changes which brush it touches. This reverses the current through the coil every half-turn.
- Revise: Uses of the generator effect
Stationary conducting contacts that press against slip rings or a commutator to connect a rotating part to an external circuit.