Few examination questions are entirely unstructured.This example has four linked sections. Part (c), the last part, requires you to combine different areas of the A-level physics specification, without leading you through the solution.
Electromagnetic induction is one of the most conceptually demanding topics in A-level physics. Because of this, the scene is set very clearly, with mention of Faraday’s law in the stem and reference in part (a)(i) to an emf being induced. In this way, the examiner is hoping that the vast majority of A-level students would have a good idea of the principles to apply. In addition, the use of ‘show that’ in parts (a)(i) and (b) reduces the possibility of students being unable to progress to part (c) as a result of obtaining no answers for the earlier parts.
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