Question

A photodiode is used preferably in

• A. in reverse bias condition
• B. in forward bias condition
• C. to increase voltage
• D. to convert electrical energy into light

Answer 1

The correct option is A

in reverse bias condition

A photodiode is used preferably in in reverse bias condition because the change in reverse current through the photodiode due to change in light flux can be measured easily as the reverse saturation current is directly proportional to the light flux.