Question

When a p-n junction diode is forward biased ______.

Options

• the barrier height and the depletion layer width both increase.

• the barrier height increases and the depletion layer width decreases.

• the barrier height and the depletion layer width both decrease.

• the barrier height decreases and the depletion layer width increases.

Answer 1

When a p-n junction diode is forward biased the barrier height and the depletion layer width both decrease.

Explanation:

Forward biasing a p-n junction diode results in a drop in barrier height as the external voltage opposes the internal potential. This decreases the diameter of the depletion region, making it easier for current to pass across the junction.