An electric toaster has a metal casing. The power cable for the toaster contains a safety wire connected to the earth pin of the plug.
Which danger does this safety wire guard against?
the heating element of the toaster overheating
the power cable to the toaster becoming too hot
the metal casing of the toaster becoming electrically live
the casing of the toaster becoming wet on the outside
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.