Question

How does an electric fuse work ??​

Answer 1

A fuse is exactly the same. It's a thin piece of wire designed to carry a limited electrical current. If you try to pass a higher current through the wire, it'll heat up so much that it burns or melts. When it melts, it breaks the circuit it's fitted to and stops the current flowing.

Answer 2

fuse works as safety device in electric circuit .
it has the slightly low melting point than the wire used in circuit
incase of more current than its power in Circuit. it mealts first and breaks thus incomplete the circuit and protect the appliances from any harm.