Question

Photodiode is a device

• A. in which photo current is dependent on the reverse bias.
• B. which is always operated in forward bias.
• C. in which photo current is independent of incident radiation.
• D. which is always operated in reverse bias.

Hint:

A photodiode generates a photocurrent when operated in reverse bias, and this current is directly related to the intensity of the incident light.

Answer 1

The Correct Option is D

Step 1: Understanding photodiodes.
A photodiode is a semiconductor device that operates in reverse bias. When light hits the junction, it generates electron-hole pairs, which contribute to the photocurrent. This current is directly dependent on the incident radiation.
Step 2: Conclusion.
The correct answer is (D), as photodiodes are always operated in reverse bias to generate photocurrents.