Two household appliances, a toaster with a metal body and a blender with a plastic body, are connected to the mains electricity supply. The toaster's cable contains an earth wire, but the blender's cable does not. What is the reason why the blender does not require an earth wire?
The blender is double-insulated, so its outer casing cannot conduct electricity to the user in the event of a fault.
The blender operates at a significantly lower voltage than the toaster.
The blender contains a fuse, which eliminates the need for an earth wire.
The blender draws a much smaller current than the toaster.
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.