GEOLOGY

Detailed explanation-1: -In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, thereby stopping or interrupting the current.

Detailed explanation-2: -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. Circuit breakers act in much the same way, but they can be reset when they blow-unlike a fuse, which must be replaced.

Detailed explanation-3: -Heating in an electrical circuit is always caused by current flowing through a resistance. If there is significant resistance in the contact between fuse and fuse holder, a current well below the fuse rating can cause enough heat to melt an inline fuse holder.

Detailed explanation-4: -If too much current flows, the fuse wire rises to a higher temperature and melts, thus opening the circuit, but destroying the fuse.

Detailed explanation-5: -If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.