Question

Why are fuse wires used in the electrical circuits at home? Why are they not used in a circuit containing electric cells?

Answer 1

A fuse is a small conducting wire of low melting point which protects the household electrical system from getting damaged due to unusual high current.

The unusual high current may be due to short circuit, power fluctuation in the electric line etc. The fuse wire is made of conducting alloy or metals of low melting point. Thin wires of metals such as: tin, aluminium, copper and thin wires of alloys of bronze, brass, nichrome are used as fuse.

There is no voltage fluctuation in circuit containing electric cells because value of emf of cell is fixed.

And in this circuits we deals with small value of current.