Question

Photodiode is a device

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

Hint:

It detects light in reverse bias.

Answer 1

The Correct Option is D

Step 1: Recall:
Photodiode symbol: a diode with arrows pointing in.

Step 2: Mode:
Used as a light detector in reverse bias.

Step 3: Pick:
Option (D).

Final Answer:
Photodiodes are used in reverse bias. \[ \boxed{D} \]