Question

A fuse is always connected in the live wire of the circuit explained.

Answer 1

Hint:First let us see what electric fuse is: An electric fuse is an electric system that in an electric circuit prevents the flow of current. Typically, a fuse is a small length of wire.

Complete step by step answer:
The electric fuse is a protection mechanism that when there is a short circuit, prevents electrical devices in the circuit from breaking the wire. It consists of an alloy consisting of tin and lead. The melting point is low and the resistance is high. A fuse is a form of low resistance resistor that functions as a sacrificial device for either the load or the source circuit to provide maximum current safety. A metal wire or strip that melts when too much current passes through it, interrupting the circuit that it binds, is the important component.
The primary causes for unnecessary currents are short circuits, overloading mismatched loads, or system failure. A fuse interrupts an unnecessary current so that it prevents additional damage due to overheating or burning. For individual circuits, wiring regulations also establish a maximum fuse current level.The fuse is attached to live wire such that once the fuse has melted due to unnecessary current, the appliance will not be charged. Fuses must be mounted to live wire such that the appliance can be removed from the high voltage live wire when it blasts.

Note:The melting point is low in fuse because this stops overloading as excess current flows, fuse wire melts and electrical circuit breaks. If a wire having high melting point is used the wire will not melt when high current flows and thus will damage electrical devices.