Q.

Fuse wire is a wire of 

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a

low melting point and high value of α

b

high melting point and low value of α

c

high melting point and high value of α

d

low melting point and low value of α

answer is D.

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Detailed Solution

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A fuse wire is a wire with a low melting point and high α. So when the current is larger than the safety limit, the heat generated increases and the wire melts off breaking the circuit. 

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