Which among the following substances cannot be used in making a fuse wire?

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Tin-lead alloy

Tin-copper alloy

Lead

Tungsten

answer is D.

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Detailed Solution

The element used to make fuse wire should be made of a metal or an alloy of an appropriate melting point.

An alloy of lead and tin is used for small current-rating fuses. Tungsten cannot be used to make fuse wire because it has a high melting point. So, it would never melt as a large(very large) amount of current is required to melt it.

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