A straight wire is held between the north pole and the south pole of a magnet. The ends of the wire are connected to a sensitive voltmeter. Which action induces a potential difference across the ends of the wire?
Holding the wire still between the poles of the magnet
Moving the wire parallel to the magnetic field lines
Moving the wire at right angles to the magnetic field lines
Increasing the diameter of the wire between the poles
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.