A technician tests the wires connected to a mains socket in a house.
The Table shows the potential difference between different pairs of wires.
Table
| Pair of wires | Potential difference in V\text{V}V |
|---|---|
| live and neutral | ............ |
| live and earth | 230 |
| neutral and earth | ............ |
Complete the Table.
State the function of the neutral wire.
A toaster with a metal case is plugged into the socket.
The earth wire is connected to the metal case.
A fault causes the live wire to touch the metal case.
Explain how the earth wire protects a person who touches the toaster.
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.