A photodiode is operated with
Correct answer: B. reverse biased
- A. forward biased
- B. reverse biased
- C. no biasing
- D. none of these
Explanation
A photodiode is typically operated in reverse bias to create a depletion region where light-generated charge carriers can be collected. Reverse biasing enhances the sensitivity of the photodiode to light.Incorrect Options and Explanations: (a) forward biased - Operating a photodiode in forward bias mode is not typical for its intended operation. (c) no biasing - Biasing is required for the proper operation of a photodiode. (d) none of these - Reverse biasing is the standard mode of operation for a photodiode.
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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