Question

In the depletion layer of reverse biased p-n junction, the

• A. electric field is very small.
• B. potential is maximum.
• C. electric field is maximum.
• D. potential is zero.

Hint:

Depletion region = strong electric field region in p-n junction.

Answer 1

The Correct Option is C

Concept:
In a p-n junction, depletion region contains immobile ions creating strong electric field. Step 1: Effect of reverse bias. Reverse bias increases width of depletion region and strengthens electric field.
Step 2: Field distribution. Maximum electric field exists inside depletion layer, especially near junction.
Step 3: Potential variation. Potential increases across depletion region, not zero.
Step 4: Conclusion. Electric field is maximum in depletion layer.