Final answer:
When a forward bias is applied to a p-n junction, the width of the depletion layer decreases and the barrier potential across the junction decreases as well.
Step-by-step explanation:
When a forward bias is applied to a p-n junction, the width of the depletion layer decreases and the barrier potential across the junction decreases as well.
In the forward bias configuration, the positive side of the battery is connected to the p-type material of the diode. This causes the depletion layer to become narrower, allowing electrons from the n-side to easily flow to the p-side. This results in a decrease in the barrier potential.
As a result of this decrease in width and potential, current can flow more readily through the diode, allowing it to conduct electricity in the forward direction.