Question

When a p-n junction diode is forward biased:

• A. the barrier height and the depletion layer width both increase.
• B. the barrier height increases and the depletion layer width decreases.
• C. the barrier height and the depletion layer width both decrease.
• D. the barrier height decreases and the depletion layer width increases.

Hint:

Forward biasing a diode reduces the barrier to charge flow, enabling current to pass through the junction, which is the basis of diode operation in electronic circuits.

Answer 1

The Correct Option is C

When a p-n junction diode is forward biased, the applied voltage reduces the built-in potential (barrier height) and the width of the depletion layer decreases. This allows majority charge carriers to cross the junction more easily, resulting in current flow. Thus, the correct answer is (C).