Question

The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased mode because:

• A. fractional change in majority carriers produce higher forward bias current.
• B. fractional change in majority carriers produce higher reverse bias current.
• C. fractional change in minority carriers produce higher forward bias current.
• D. fractional change in minority carriers produce higher reverse bias current.

Answer 1

Answer: (D)

fractional change in minority carriers produce higher reverse bias current.

Answer 2

A photodiode operates under reverse bias conditions, and when illuminated, it generates charge carriers. The fractional variation in minority carriers is significant due to the initial current being extremely low.

So, the correct option is (D): fractional change in minority carriers produce higher reverse bias current.