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(B) In a $P-N$ junction diode,when a forward bias voltage is applied,the positive terminal of the battery is connected to the $P$-region and the negat

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decreases

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(B) In a $P-N$ junction diode,when a forward bias voltage is applied,the positive terminal of the battery is connected to the $P$-region and the negative terminal to the $N$-region.This external electric field opposes the internal electric field of the depletion region.As the forward voltage increases,the potential barrier decreases,which causes the majority charge carriers (holes in $P$ and electrons in $N$) to be pushed towards the junction.Consequently,the width of the depletion layer decreases.

If the forward voltage in a diode is increased,the thickness of the depletion layer .......

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