A person standing on a dry wooden floor touches a live wire and feels a small shock. A second person standing barefoot on a wet concrete floor touches the same wire and is badly injured. Which statement explains the difference?
The resistance of the path to earth is much lower for the second person
The potential difference between the wire and earth is larger for the second person
The live wire carries a much larger alternating current than it did before
The earth wire of the circuit carries the current through the second person
40 exam-style questions on AQA GCSE Physics 2.3 Domestic uses and safety, covering 2.3.1 Direct and alternating potential difference and 2.3.2 Mains electricity. Each one has a worked solution and a mark scheme showing where the marks go.