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Photo-diodes work in ___________

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Photo-diodes work in ___________

(a) forward biased

(b) reverse biased

(c) independent of forward and reverse biasing

(d) any configuration

This question was posed to me at a job interview.

My question comes from Video Printers topic in portion Recording System of Biomedical Instrumentation

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Best answer
The correct answer is (b) reverse biased

To elaborate: The photodiode is a P-N junction semiconductor diode. It always operated in the reversed biased condition. The light is always focused through a glass lens on the junction of the photo diode.

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