An electric pottery wheel has an exposed metal frame. It is connected to the mains by a three-core cable, and a fuse is fitted in the live wire.
During a repair, the earth wire is left disconnected. A later fault causes the live conductor to touch the metal frame.
A person standing on the ground touches the metal frame.
Explain why the fuse may not protect the person from an electric shock.
81 exam-style questions on Edexcel GCSE Physics 10.4 Mains electricity, covering 10.4.1 Direct and alternating current, 10.4.2 Live, neutral and earth wires; safety, 10.4.3 Mains wire potential differences and dangers, and 10.4.4 Power ratings and energy use. Each one has a worked solution and a mark scheme showing where the marks go.