A student drops a bar magnet down a vertical copper tube. The student then drops the same magnet down a plastic tube of the same size. The magnet takes much longer to fall through the copper tube than through the plastic tube.
Explain why the magnet takes longer to fall through the copper tube.
Give the reason why the magnet falls freely down the plastic tube.
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.