Why a fuse wire is made up of alloy of lead or tin plated copper wire?

Answer 1

because of its low melting point and high resistance.

add. Because of the tendency of a fuse wire to become slightly warm during normal use, its surface would tend to oxidize and thus diminish its cross-section during ordinary service. Leading to premature and improper failure.

So it is important to protect the surface of fuse wire against corrosion.

Answer

Alloys (e.g. tin/lead) are used due to their 'eutectic' action -i.e. the resulting combination of good conductivity (due to the tin) with a low melting point due to the lead).

Answer 2

A fuse wire needs to have a relatively low melting point so that it can melt easily when there is an excess current, thus breaking the circuit and preventing damage. Alloys of lead or tin have lower melting points compared to pure copper, making them suitable materials for fuse wires. Additionally, the plating helps to protect the wire from corrosion and improve its conductivity.