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

Answer: (b). Copper is a metal: ρ increases with T (positive α). At low T, ρ does not go to zero (residual resistivity) and rises non-linearly; at higher T it rises faster. Graph (b) shows a rising curve with a non-zero intercept. So the answer is (b).

Which of the following graph represents the variation of resistivity… | NEET 2020 (Phase 1)

Q39NEET 2020 · PHASE 1Easy

Ohm's Law, Resistivity & Temperature

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

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Answer: (b)

Copper is a metal: $\rho$ increases with $T$ (positive $\alpha$ ).
At low $T$ , $\rho$ does not go to zero (residual resistivity) and rises non-linearly; at higher $T$ it rises faster.
Graph (b) shows a rising curve with a non-zero intercept.
So the answer is (b).

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