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ExamsNEETPhysics

A depletion layer consists of

  1. electrons
  2. protons
  3. mobile ions
  4. immobile ions

Correct answer: immobile ions

Solution

The depletion layer in a PN junction is formed due to the diffusion of charge carriers, leaving behind immobile ions (positive ions in the N-region and negative ions in the P-region). These ions create an electric field that opposes further diffusion.

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