Which of the following graph shows variation of resistivity of copper, nicrome and semiconductor with temperature respectively are

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A, B, C

B, A, C

C, A, B

answer is B.

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Detailed Solution

In conductors average relaxation time decreases with increase in temperature resulting in increase in resistivity. The variation of resistivity of copper with temperature is parabolic in nature

For nichrome it is linear and for semiconductors due to generation of charge carriers due to heating resistivity decreases with temperature.

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