A workshop is building a generator for a test bench that needs an alternating potential difference. The generator has a coil that rotates between the poles of a magnet.
Which part should connect the ends of the coil to the external circuit?
A split-ring commutator, which swaps the connections every half-turn
Two slip rings, which swap the connections every half-turn
Two slip rings, which keep the connections without swapping them
A split-ring commutator, which keeps the connections without swapping them
96 exam-style questions on AQA GCSE Physics 7.3 Induced potential, transformers and the National Grid (HT only), covering 7.3.1 Induced potential (HT only), 7.3.2 Uses of the generator effect (HT only), 7.3.3 Microphones (HT only), and 7.3.4 Transformers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.