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Specific resistance of copper, silver an...

Specific resistance of copper, silver and constantan are `1.18xx10^(-6)Omega` cm, `1xx10^(-6)Omega` cm and `48xx10^(-6)Omega` cm respectively. Which is the best electrical conductor and why?

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Silver is the best conductor because its specific resistance is the lowest of the given materials `because R proprho`.
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