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Why photodiodes are required to operate ...

Why photodiodes are required to operate in reverse bias explain.

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### Step-by-Step Solution: 1. **Understanding Photodiodes**: - A photodiode is a semiconductor device that converts light into an electrical current. It is designed to operate under the influence of light. 2. **P-N Junction Structure**: - A photodiode consists of a p-n junction, which is formed by joining p-type and n-type semiconductors. This junction creates a depletion region where mobile charge carriers (electrons and holes) are absent. ...
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