CBSE 2026 · Region 4 · Set 3 · Q8 · 1 mark
The resistivity $\displaystyle \rho$ of a metal increases with rise in temperature because :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
' $\displaystyle \tau$ ' decreases with temperature but 'n' does not change appreciably.
Current ElectricityTemperature Dependence of ResistivityUnderstandmcqmedium
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CBSE Class 12 Physics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.