Explanation:

fuse or circuit breaker prevents this by ''blowing,'' or breaking the circuit, when an overload occurs. Fuses screw into threaded sockets inside the fuse box. The fuses contain a thin strip of metal that melts if the current (or amperage) flowing through that circuit exceeds the amount for which that fuse is rated.

Answer:

if there is over flow of electricity the fuse start to melt . if it's melted there will be no flow of electricity