Electric Fuse.
It is a safety device which prevents damages to electric circuits and prevents electric fires. Sometimes, the two wires of electricity at home and factories come in contact with each other and cause short circuit then the amount of electric current of circuit increases as a result of decrease in resistance and the electric appliances. The circuit catch fire due to production of heat. To Prevent this type of danger, fuse wires are connected to circuit wires.
Working.
In general, the fuse wire is a thin, small wire which is an alloy of copper, tin and lead. It has a very low melting point as compared to copper. This wire is connected between the two terminals of a Porcelain holder. For the circuit which is to keep safe, the two joining wires are connected in series.
The fuse wire has a fixed capacity according to its thickness. The fuse wire, when more current passes through it, melts after getting heated. The circuit breaks with the melting of the wire and the flow of electric current is obstructed. As a result the fault in any instrument or circuit is found out immediately. After removing that fault, a new fuse wire is put in fuse holder and the flow of electric current is started again.
