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MHT CET202615 April 2026Morning ShiftPhysicsSemiconductorsActual

If p-n junction diode is forward biased then

Options

  1. Awidth of depletion layer decreases.
  2. Bwidth of depletion layer increases.
  3. Cbarrier voltage increases
  4. Delectric conduction is not possible

Correct answer

A. width of depletion layer decreases.

Step-by-step solution

When a p-n junction diode is forward biased, the positive terminal of the external voltage source is connected to the p-side and the negative terminal to the n-side. The applied forward voltage opposes the built-in potential barrier, reducing the effective barrier voltage. This external electric field pushes the majority charge carriers (holes in the p-region and electrons in the n-region) towards the junction. As the carriers move towards the junction, they neutralize some of the immobile ions, which causes the wi

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