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Q.

A photo diode  is used in reverse  bias  condition because

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a

Fractional  change due to the photo  effects on the  minority carrier  dominated reverse bias current is more easily measurable than that of forward bias current

b

The  current in forward bias is  more than reverse bias current

c

A photo diode  cannot  detect forward bias current

d

it’s  convenient for usage

answer is D.

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Detailed Solution

Connection in reverse biasing increase the size of depletion layer , which increases the generation of new electron-hole pairs.

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