How to achieve biasing in photodiodes?

Question

How to achieve biasing in photodiodes?

Answer 1

Here are many circuits that demonstrate many of the modes of operation for a photodiode:

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Answer 2

Photodiodes always work in 'reverse biasing'.

Connect +ve terminal of the battery to the -ve terminal of Diode and the other -ve to +ve.

Now if light falls on the photodiode it will stats conducting which can  be detected with a ammeter.