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

Depletion Region Formation
- The n-region of a p-n junction contains surplus electrons, while the p-region has an abundance of holes.
- Electrons migrate from the n-region to the p-region due to this concentration gradient.
- Concurrently, holes migrate from the p-region to the n-region.
- This diffusion process establishes a depletion region that impedes subsequent diffusion.
Therefore, the correct explanation is: Electrons diffuse from the n-region into the p-region, and holes diffuse from the p-region into the n-region.