A manufacturer is choosing the position of the on/off switch in a mains-powered, metal-cased bench fan.
Which statement gives the correct position for the switch?
The switch should be in the neutral wire between the fan's internal components and the mains supply.
The switch should be in the live wire between the mains supply and the fan's internal components.
The switch should be in a separate branch connected in parallel with the fan's internal components.
The switch should be in the earth wire between the fan's metal case and the earth terminal.
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.