Q. when photo diode is used in _ the amount of electrons flowing through the PN junction barrier are proportional to the amount of light incident on the diode.
Solution:
when photo diode is used in reverse bias the amount of electrons flowing through the PN junction barrier are proportional to the amount of light incident on the diode. A current is generated in a depletion region due to the absorbed light. This the amount of current is proportional to the light intensity
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