A disconnected appliance has a switch in its neutral wire. When the appliance is plugged into a working mains socket, the switch remains open.
Which statement about its internal connections is correct?
The live-side connection can be dangerous even though the appliance is not operating.
The live-side connection is safe because the open switch removes its voltage to earth.
The neutral-side connection becomes live because the current cannot pass the switch.
The earth connection supplies current because the neutral connection has been broken.
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.