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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).

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