Question

Fuse wire is made up of an alloy of ?

Answer 1

Fuse wire:

• The fuse is a mechanism that guards against overcurrent entering the circuit, which could harm the electrical appliances.
• Since the amount of current in a fuse easily exceeds the allowed value, the fuse wire needs to be made of a material with high resistance and low melting point.
• Materials with higher resistance generate more heat as current flows through them, and as a result, become heated faster than those with lower resistance, and higher melting point materials do not melt as quickly as lower melting point materials.
• Due to their high resistance and low melting point, tin and lead are combined to form the fuse wire.
• The composition of the tin and lead alloy, which melts at ${183}^{°}\mathrm{C}$, is $62\%$tin and $38\%$ lead.

Therefore, the fuse wire is made up of an alloy of tin and lead.