A student turns the handle of a hand-powered generator. When the terminals of the generator are left unconnected the handle turns easily. When a lamp is connected across the terminals the handle becomes harder to turn.
Explain why the handle is harder to turn when the lamp is connected.
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.