There is an alternating current in the primary coil of a transformer. The primary coil and the secondary coil are not joined to each other by any wire.
Explain why there is an alternating potential difference across the ends of the secondary coil.
The alternating supply is replaced by a cell. The potential difference across the secondary coil is now zero. Give the reason why.
40 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.