Question

what is an electric fuse? explain how an electric fuse helps to protect a circuit ​

Answer 1

Answer:

The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong.

Answer 2

Answer:

Fuses and circuit breakers protect electrical circuits and appliances.

Explanation:

The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.

Fuses in plugs are made in standard ratings. The most common are 3 A, 5 A and 13 A. The fuse should be rated at a slightly higher current than the device needs:

if the device works at 3 A, use a 5 A fuse

if the device works at 10 A, use a 13 A fuse