CBSE 2025 · Region 2 · Set 1 · Q13 · 1 mark
Assertion (A) : In a semiconductor diode the thickness of depletion layer is not fixed.
Reason (R) : Thickness of depletion layer in a semiconductor device depends upon many factors such as biasing of the semiconductor.
Official answer
From CBSE’s own marking scheme for this paper.
(A)
If both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A) .
Semiconductor Electronics: Materials, Devices and Simple Circuitsp-n JunctionUnderstandassertion_reasonmedium
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CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.