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Physics · 2023 · 1 mark
Semiconductor Electronics: Materials, Devices and Simple CircuitsExtrinsic Semiconductor1 markApplymcq
CBSE 2023 · Region 2 · Set 1 · Q13
In an extrinsic semiconductor, the number density of holes is 4 × 10^20 m^-3. If the number density of intrinsic carriers is 1.2 × 10^15 m^-3, the…
In an extrinsic semiconductor, the number density of holes is $\displaystyle 4 \times 10^{20} \mathrm{~m}^{-3}$. If the number density of intrinsic carriers is $\displaystyle 1.2 \times 10^{15} \mathrm{~m}^{-3}$, the number density of electrons in it is
Official answer
(C)
$\displaystyle 3.6 \times 10^{9} \mathrm{~m}^{-3}$
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CBSE Class 12 Physics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.