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Physics · 2022 · 2 marks
Dual Nature of Radiation and MatterExperimental Study of Photoelectric Effect2 marksUnderstandvery short answer
CBSE 2022 · Region 3 · Set 2 · Q2
(a) Draw the circuit diagram of an illuminated photodiode and its I-V charcteristics. 1 (b) How can a photodiode be used to measure the light…
(a)
Draw the circuit diagram of an illuminated photodiode and its I-V charcteristics. $\displaystyle 1$
(b)
How can a photodiode be used to measure the light intensity ?
Marking-scheme solution
(a) 
(b)
(b)(b) Photo current flows in an illuminated photodiode under reverse bias. The magnitude of photocurrent varies linearly as the intensity of incident light.This fact is used to measure the light intensity.
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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.