JEE MAIN - Physics (2022 - 25th June Morning Shift - No. 16)
The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased mode because :
fractional change in majority carriers produce higher forward bias current
fractional change in majority carriers produce higher reverse bias current
fractional change in minority carriers produce higher forward bias current
fractional change in minority carriers produce higher reverse bias current
Explicació
A photodiode is reverse biased. When light falling on it produces charge carriers, the fractional change, in minority carriers is high since the original current is very small.