i.
A
fuse is used to protect a circuit and the appliances connected in the circuit
by stopping the flow of an excess electric current. For this, a fuse is
connected in series in the circuit.
ii.
When
the current in the circuit passes through the fuse, its temperature increases.
When the current exceeds the specified value, the fuse must melt to break the
circuit. For this, the material used for a fuse has low melting point.
