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MHT CET Medical202623 April 2026Evening ShiftPhysicsSemiconductorsActual

The potential barrier in p-n junction diode is due to

Options

  1. Adepletion of positive charges near the junction.
  2. Baccumulation of positive charges near the junction.
  3. Cdepletion of negative charges near the the junction.
  4. Daccumulation of positive and negative charges near the junction.

Correct answer

D. accumulation of positive and negative charges near the junction.

Step-by-step solution

When a p-n junction is formed, majority charge carriers diffuse across the junction due to the concentration gradient. Electrons from the n-region diffuse into the p-region, leaving behind immobile positively charged donor ions. Similarly, holes from the p-region diffuse into the n-region, leaving behind immobile negatively charged acceptor ions. These immobile positive and negative ions accumulate near the junction, creating a region devoid of mobile charge carriers known as the depletion region. The accumulation

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