Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Photodiodes are preferably operated in reverse bias condition for light intensity measurement
Reason R: The current in the forward bias is more than the current in the reverse bias for a $p-n$ junction diode
In the light of the above statements, choose the correct answer from the options given below:

• A. A is true but $R$ is false
• B. Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
• C. A is false but $R$ is true
• D. Both $A$ and $R$ are true but $R$ is $N O T$ the correct explanation of $A$

Answer 1

Answer: (B)

Both $A$ and $R$ are true and $R$ is the correct explanation of $A$

Answer 2

Photodiodes are operated in reverse bias as fractional change in current due to light is more easy to detect in reverse bias.