Physics - Semiconductors Question with Solution | TestHub

When a p-n junction is forward biased, the positive terminal of the external voltage source is connected to the p-region and the negative terminal to the n-region.

The applied external voltage opposes the built-in potential barrier of the junction. As a result, the effective potential barrier across the junction decreases, which reduces the width of the depletion layer and allows majority charge carriers to flow across the junction easily.

Answer: decreases