An electric heater with a metal body is connected to the mains electricity supply. The circuit contains a live wire, a neutral wire, an earth wire, and a fuse.
Which of the following statements is not correct?
The fuse is connected in series with the neutral wire to cut off the returning current.
If the live wire becomes loose and touches the metal body, current flows to the ground through the earth wire.
The earth wire must have a very low resistance to allow a large current to flow in the event of a fault.
When a fault occurs, the high current flowing through the fuse causes it to melt and isolate the appliance.
135 exam-style questions on CIE IGCSE Physics Electrical safety, covering Electrical safety. Each one has a worked solution and a mark scheme showing where the marks go.