- Exam
- NEET
- Subject
- Physics
- Chapter
- Semiconductors
NEET · Physics · Semiconductors
Given below are two statements: one is labelled as Assertion A and...
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 junction diode.
In the light of the above statement, choose the correct answer from the options given below :
Options
- AA is false but R is true
- BBoth A and R are true but R is NOT the correct explanation of A
- CA is true but R is false
- DBoth A and R are true and R is the correct explanation of A
Correct answer
B. Both A and R are true but R is NOT the correct explanation of A
Step-by-step solution
In reverse bias condition of photodiode, the change in saturation reverse current is directly proportional to the change in the incident light flux or light intensity, which can be measured accurately. It is not so when photodiode is forward bias.