A certain electrical appliance is powered from a mains supply. The appliance normally uses a current of 3 A, but the current briefly rises to 4 A at the instant the appliance is switched on. The cable to the appliance is designed for currents up to 6A.
The fuses available to protect the cable are rated at 1A, 3A, 5A and 13A.
Which fuse should be used?
1 )
1 A
2 )
3 A
5 A
4 )
13 A
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