Exam-style question
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What is the primary function of a photodiode in a circuit?.
- A.To amplify electrical signals.
- B.To convert light energy into electrical energy.
- C.To store electrical energy.
- D.To regulate voltage.
Model answer
What a good answer should say
- To convert light energy into electrical energy.
Explanation
Why this works
The evidence shows that photodiodes operate by absorbing photons and generating electron-hole pairs, which results in a flow of current. This implies that photodiodes are essential components in circuits that require light detection and conversion to electrical signals.
Thus, we conclude that their primary function is to convert light energy into electrical energy.
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