Question

When a p-n junction diode is subjected to reverse biasing:

• A. The barrier height decreases and the depletion region widens.
• B. The barrier height increases and the depletion region widens.
• C. The barrier height decreases and the depletion region shrinks.
• D. The barrier height increases and the depletion region shrinks.

Hint:

In reverse bias, the barrier height increases and the depletion region widens, leading to the prevention of current flow.

Answer 1

The Correct Option is B

In reverse biasing, the external voltage opposes the potential barrier of the p-n junction, which causes the depletion region to widen. This happens because the external voltage increases the barrier height, preventing current from flowing (except for a very small leakage current).