In a mains-voltage electrical circuit, where must both a fuse and a switch be connected to ensure the appliance is safely isolated from the high-voltage supply when they are open or blown?
the earth wire only
the neutral wire only
the live wire only
the fuse in the live wire and the switch in the neutral wire
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.