Exam-style question
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How does light intensity affect the photocurrent in a photodiode?.
- A.Higher light intensity decreases the photocurrent.
- B.Light intensity has no effect on photocurrent.
- C.Higher light intensity increases the photocurrent.
- D.Photocurrent is only dependent on the voltage applied.
Model answer
What a good answer should say
- Higher light intensity increases the photocurrent.
Explanation
Why this works
In a photodiode, the photocurrent is directly proportional to the intensity of light incident on it. As light intensity increases, more charge carriers are generated, resulting in a higher photocurrent.
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