Question

During the formation of p - n junction:

• A. Majority holes diffuse from n side to p side
• B. Majority electrons diffuse from p side to n side
• C. Ionized donors formed on p side
• D. Ionized acceptors formed on n side
• E. The space charge region on either side of the junction is called depletion region

Hint:

The space charge region, or depletion region, is formed due to the diffusion of majority carriers (electrons and holes) across the p-n junction. This region is devoid of free charge carriers and is crucial for the formation of the electric field in the junction.

Answer 1

Answer: (E)

During the formation of a p-n junction:

- Electrons from the n-type side (where they are the majority carriers) diffuse into the p-type side (where holes are the majority carriers), creating a region near the junction where there are no free charge carriers. This is called the depletion region.

- In the p-type material, the holes move towards the n-side, and in the n-type material, the electrons move towards the p-side. These movements of charge carriers leave behind ionized donor ions on the p-side and ionized acceptor ions on the n-side. This results in the formation of the space charge region.

Therefore, the correct answer is:

\[ \boxed{\text{E) The space charge region on either side of the junction is called depletion region}} \]