Fuse wire is a wire of (a) high resistance and high melting point (b) high resistance and low melting point (c) low resistance and low melting point (d) low resistance and high melting point

Answer: (b). A fuse must heat up quickly ( I² R large), so it needs high resistance (high resistivity). It must melt at a modest overload current, so it needs a low melting point. So the answer is (b) high resistance and low melting point.

Fuse wire is a wire of | NEET 2003 (AIPMT)

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Electrical Power & Heating Effect

Fuse wire is a wire of

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Answer: (b)

A fuse must heat up quickly ( $I^2 R$ large), so it needs high resistance (high resistivity).
It must melt at a modest overload current, so it needs a low melting point.
So the answer is (b) high resistance and low melting point.

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