A-LevelPhysicsMagnetic fieldsMay/June 2018Paper 4 Q106 Marks
10 (a) State Faraday's law of electromagnetic induction. (b) A coil of insulated wire is wound on to one end of a ferrous core and connected to a battery, as shown in Fig. 10.1. [Figure 10.1] An aluminium ring is placed on the core. The ring can move freely along the length of the core. The switch is initially open. Use Faraday's law and Lenz's law to explain why the aluminium ring jumps upwards when the switch is closed.
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