Photodiode Mode
Mediumphysics
Photodiode typically operated in?
Select the correct option:
Solution
Incorrect! Answer:
Reverse bias
- Definition: A photodiode is a PN junction device used to detect light signals.
- Operational Mode: It is intentionally operated under reverse bias conditions.
- Reasoning: In reverse bias, the dark current (current without light) is very small. When light strikes the depletion region, it creates new electron-hole pairs.
- Sensitivity: These photo-generated carriers increase the reverse current significantly. The fractional change in reverse current due to light is much larger and easier to measure than the fractional change in forward current would be.
- Proportionality: The reverse photocurrent is directly proportional to the incident light intensity.
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About This Question
- Subject
- physics
- Chapter
- semiconductor devices
- Topic
- photodiode mode
- Difficulty
- Medium
- Year
- 2025
This medium difficulty physics question is from the chapter semiconductor devices, covering the topic of photodiode mode. It appeared in the 2025 exam. Practice this and similar questions to strengthen your understanding of semiconductor devices concepts.
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