Question

During the formation of a p-n junction:

• A. Electrons diffuse from p-region into n-region and holes diffuse from n-region into p-region.
• B. Both electrons and holes diffuse from n-region into p-region.
• C. Electrons diffuse from n-region into p-region and holes diffuse from p-region into n-region.
• D. Both electrons and holes diffuse from p-region into n-region.

Hint:

A p-n junction forms due to the diffusion of electrons from the n-side and holes from the p-side, leading to a depletion region.

Answer 1

The Correct Option is C

Formation of Depletion Region
- In a p-n junction, the n-region has excess electrons, and the p-region has excess holes.
- Due to the concentration difference, electrons diffuse from the n-region to the p-region.
- Similarly, holes diffuse from the p-region to the n-region. - This diffusion leads to the formation of a depletion region, preventing further diffusion. Thus, the correct answer is Electrons diffuse from n-region into p-region and holes diffuse from p-region into n-region.