A-level examinations include indirect assessment of practical skills. Each board has its own series of required practicals, but exam questions may also be set on unfamiliar experiments. The experiment in this question — to find the specific latent heat of vaporisation of water — is an example. Many students would not have seen this exact set-up before, but would have seen similar techniques in other situations.
The question is taken from the June 2018 Edexcel Advanced Physics Paper 3, which is a synoptic paper covering the general and practical principles of the whole specification. The question is reproduced by kind permission of Pearson Education Ltd (Edexcel). The answers that follow are the responsibility of PHYSICS REVIEW and Edexcel accepts no responsibility whatsoever for their accuracy or method of working.
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