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In an unbiased p - n junction electrons diffuse from n-region to p-region because:

Options

  1. Aelectrons travel across the junction due to potential difference
  2. Bonly electrons move from n to p region and not the vice - versa
  3. Celectron concentration in n - region is more as compared to that in p - region
  4. Dholes in p - region attract them

Correct answer

C. electron concentration in n - region is more as compared to that in p - region

Step-by-step solution

In a p - n junction diffusion occurs due to spontaneous movement of majority charge carrier from the region of high concentration to low concentration.

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