The material of a fuse wire should have:

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(C) fuse wire is a safety device used to protect electrical circuits from excessive current. According to Joule's law of heating,the heat produced is

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$A$ high specific resistance and low melting point

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(C) fuse wire is a safety device used to protect electrical circuits from excessive current. According to Joule's law of heating,the heat produced is given by $H = I^2Rt$,where $I$ is the current,$R$ is the resistance,and $t$ is the time. To ensure the fuse melts quickly when the current exceeds a safe limit,it must have a high resistance (so that more heat is generated) and a low melting point (so that it melts easily). Therefore,the material of a fuse wire should have a high specific resistance and a low melting point.

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