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Physics · 2022 · 2 marks
Semiconductor Electronics: Materials, Devices and Simple Circuitsp-n Junction2 marksUnderstandvery short answer
CBSE 2022 · Region 2 · Set 1 · Q1
Explain the formation of depletion region in a p-n junction.
Explain the formation of depletion region in a p-n junction.
Marking-scheme solution
When p-type semiconductor is chipped with n-type semiconductor, $\displaystyle \mathrm{e}^{-}$from the n-side diffuse towards p-side and holes from p-side diffuse towards n-side leaving behind a layer of immobile +ve ions on n-side and immobile -ve ions on p-side leading to formation of depletion layer.
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CBSE Class 12 Physics past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.