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Physics · 2026 · 3 marks
Semiconductor Electronics: Materials, Devices and Simple Circuitsp-n Junction3 marksUnderstandshort answer
CBSE 2026 · Region 3 · Set 1 · Q28
With the help of circuit diagrams, briefly explain the forward biasing and the reverse biasing of a p-n junction diode.
With the help of circuit diagrams, briefly explain the forward biasing and the reverse biasing of a p-n junction diode.
Marking-scheme solution
Forward biasing
The p-side of the diode is connected to the positive terminal and the n-side is connected to the negative terminal of the battery.
Reverse biasingThe p-side of the diode is connected to the negative terminal and the n-side is connected to the positive terminal of the battery.
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.