Which statement correctly describes the main safety function of an earth wire in a mains electrical circuit?
to prevent the current in the circuit from becoming too large during normal operation
to provide a safe path for current to flow to the ground if the live wire touches the metal casing
to disconnect the circuit automatically when the current exceeds a certain limit
to reduce the amount of electrical energy consumed by 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.