An electrical appliance is powered from a mains supply. The appliance normally uses a current of 7 A, but the current briefly rises to 9 A at the instant the appliance is switched on. The cable connecting the appliance is designed to safely carry currents up to 15 A.
The fuses available to protect the cable are rated at 5 A, 8 A, 10 A and 18 A.
Which fuse should be used?
5 A5\text{ A}5 A
8 A8\text{ A}8 A
10 A10\text{ A}10 A
18 A18\text{ A}18 A
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.