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Question

What should be the characteristic of a fuse wire?

A
High melting point, high specific resistance
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B
Low melting point, low specific resistance
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C
High melting point, low specific resistance
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D
Low melting point, high specific resistance
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Solution

The correct option is D Low melting point, high specific resistance
A fuse wire is supposed to melt immediately when there is a flow of dangerously high amount of current through the circuit, in-order to prevent further damage and that is possible only if the wire's melting point is low and resistivity is high.

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