Question

Explain why fuse wire is made of a tin-lead alloy and not copper?

Answer 1

Fuse wires are made of Tin-lead alloy instead of copper due to various reasons.
This wire is consist of low melting point as well as the have the high resistance.
The alloy result in good functioning of the fuse. As the tin cause the good conductivity property . Also the low melting point occur due to the lead.
Other wise the fuse can cause problem due to the surface corrosion.
Hope this helps.

Answer 2

Fuse wire is made of a tin-lead alloy and not copper because of the following reasons:

1. They have high resistance due to high resistance the wire heats up quickly, when large current flows.

Heating power of wire(P) = I² × R

2. They have low melting point which melts and breaks off the circuit if the current is larger than the safety limit.



In Fuse wire a copper wire can not be used because it has a high melting point. Copper wire will not melt easily when a high electric current passes through it and may harm the electrical appliances attached to it.

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Hope this will help you...