An electrical appliance with a metal outer casing is to be safely connected to the mains electricity supply. Which statement is correct?
It must be connected with both a fuse and an earth wire.
It can be safely connected with a fuse only.
It can be safely connected with an earth wire only.
It does not require either a fuse or an earth 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.