A wire is moved downwards at a steady speed between the poles of a magnet. A current is induced in the wire.
The student moves the wire upwards instead, at the same steady speed. Describe the effect on the induced current.
The magnet is now turned round so that its poles are the other way round. The wire is moved downwards again at the same steady speed. Describe the effect on the induced current, compared with the original current.
The student now moves the wire upwards, with the magnet still turned round. Explain the effect on the induced current, compared with the original current.
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.