Question

Which of the following diode is reverse biased :-

• A. I
• B. II
• C. III
• D. IV

Answer 1

The correct option is C III

Current only flows from a higher potential to a lower potential. Also, the ends of the circuit that are grounded remain at zero potential.

In cases (I), (II) & (IV), the diodes are connected in the forward bias.

In case (III), the $\text{p -}$side is connected to the lower potential, and $\text{n -}$side is connected to the higher potential, suggesting that the diode is in reverse bias.