Exam-style question
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How does the I-V characteristic curve of a photodiode differ from that of a regular diode?.
- A.Photodiodes have a higher forward voltage drop.
- B.Photodiodes can operate in reverse bias to generate current.
- C.Photodiodes do not conduct current.
- D.Photodiodes have a linear I-V relationship.
Model answer
What a good answer should say
- Photodiodes can operate in reverse bias to generate current.
Explanation
Why this works
The evidence indicates that photodiodes are designed to operate in reverse bias, allowing them to generate a photocurrent when exposed to light, unlike regular diodes which primarily conduct in forward bias. This implies that photodiodes are specifically tailored for light detection.
Therefore, we conclude that their unique I-V characteristics make them suitable for applications in optical sensing.
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