The normal operating current of an electric space heater is 8 A and it is protected by a 10 A fuse. The owner of the heater replaces the 10 A fuse with a 5 A fuse. What happens when the heater is switched on?
The fuse blows and the heater is damaged.
The fuse blows and the heater is undamaged.
The fuse does not blow and the heater works correctly.
The fuse does not blow but the heater fails to work.
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.