Question

In an unbiased $p-n$ junction which of the following is correct?

• A. p-side is at higher potential than n-side
• B. n-side is at higher potential than p-side
• C. Both p-side and n-side are at the same potential
• D. Any of the above is possible depending upon the carrier density in the two sides

Answer 1

Answer: (B)

In the depletion region $n$ -side has positive ions and $p$ -side is with negative ion.
Hence $n$ -side has longer potential.