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MHT CET202620 April 2026Evening ShiftPhysicsSemiconductorsActual

The depletion region of p-n junction

Options

  1. Aincreases if reverse biased.
  2. Bincreases if forward biased.
  3. Cdecreases if reverse biased.
  4. Dremains same in reverse and forward biasing.

Correct answer

A. increases if reverse biased.

Step-by-step solution

In a p-n junction, when it is reverse biased, the positive terminal of the battery is connected to the n-type region and the negative terminal to the p-type region. The applied reverse voltage is in the same direction as the built-in potential barrier. This increases the effective potential barrier across the junction. As a result, the majority charge carriers are pulled away from the junction, which causes the width of the depletion region to increase. Conversely, during forward biasing, the applied voltage oppose

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