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The graph between resistivity and temperature, for a limited range to temperature is a straight line for a material like

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Copper

Nichrome

Silicon

Mercury

answer is B.

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Detailed Solution

Even at 0 K temperature the specific resistivity of Nichrome is very high and it varies linearly with increase in temperature. It has a high specific resistivity due to which it opposes the flow of current and hence it has a high resistance too.

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