Exam-style question
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Describe the I-V characteristics of a photodiode when exposed to increasing light intensity. What does this indicate about the relationship between light intensity and photocurrent?.
Model answer
What a good answer should say
- As light intensity increases, the photocurrent in a photodiode also increases.
- This indicates that the photodiode generates more charge carriers when more photons are absorbed, leading to a higher current flow.
Explanation
Why this works
This answer effectively demonstrates an understanding of the relationship between light intensity and photocurrent in photodiodes. It tests the student's ability to interpret the I-V characteristics qualitatively, linking the increase in light intensity to an increase in photocurrent.
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