CBSE 2026 · Region 3 · Set 1 · Q11 · 1 mark
When the forward bias voltage in a semiconductor diode is changed from $\displaystyle 0.8$ V to $\displaystyle 1.0$ V, the forward current changes by $\displaystyle 2.0$ mA. The forward bias resistance of the diode will be :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 100 \Omega$
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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.