Exam-style question
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What is the effect of reverse bias on a photodiode?.
- A.It increases the sensitivity of the photodiode
- B.It decreases the sensitivity of the photodiode
- C.It causes the photodiode to conduct continuously
- D.It has no effect on the photodiode
Model answer
What a good answer should say
- It increases the sensitivity of the photodiode
Explanation
Why this works
Applying reverse bias to a photodiode widens the depletion region, allowing for more efficient collection of charge carriers generated by incident light, thus increasing sensitivity.
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