CBSE Class 12 Physics 2022 Term 2 Outside Delhi Set 2 Solved Paper

Question : 1

Total: 4

(a) Draw the circuit diagram of an illuminated photodiode and its I-V characteristics. 1
(b) How can a photodiode be used to measure the light intensity?
1

Solution:

(a) Illuminated photo diode circuit:

I-V characteristics of photo diode:

(b) As the intensity of light increases, more number of photons are incident on the photo diode. So more number of electronhole pairs are produced. The photo current increases. So, the photo current indicates the light intensity.

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