What is a fuse? How does it function?

(N/A) An electric fuse is a safety device used to limit the current in an electric circuit.
Its primary purpose is to protect the circuit and the connected appliances from damage due to excessive current flow.
The fuse consists of a short piece of wire made from a material with a low melting point.
When an electric current passes through the fuse,it generates heat.
If the current exceeds the safe limit,the heat produced is sufficient to melt the fuse wire,which breaks the circuit and stops the flow of electricity.