When the PN junction is forward biased, the width of the depletion region:

Explanation

When a PN junction is forward biased, the width of the depletion region decreases.In a forward-biased PN junction:The positive terminal of the voltage source is connected to the P-type semiconductor, and the negative terminal is connected to the N-type semiconductor.This applied voltage counteracts the built-in potential barrier of the junction, reducing the barrier's effective width.As a result, majority carriers (holes from the P-type and electrons from the N-type) are pushed toward the junction and easily cross it, contributing to the reduction in the width of the depletion region.Therefore, in the forward bias condition, the width of the depletion region decreases, allowing for increased conductivity across the junction.