CBSE 2024 · Region 4 · Set 1 · Q14 · 1 mark
Assertion (A) : The temperature coefficient of resistance is positive for metals and negative for p -type semiconductors.
Reason (R) : The charge carriers in metals are negatively charged, whereas the majority charge carriers in p-type semiconductors are positively charged.
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Current ElectricityTemperature Dependence of ResistivityAnalyseassertion_reasonmedium
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CBSE Class 12 Physics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.