Q.

Which of the following graph represents the variation of resistivity (ρ) with temperature (T) for
copper? 

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a

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b

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c

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d

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answer is B.

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Detailed Solution

Resistivity of copper (a metal) as a function of temperature
increases with the increase in temperature as shown below,

Question Image

For copper at OK, value of resistivity is 1. 7 X 10-8 Ω-m.
Hence, correct option is (2).

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