If the $\mathrm{p}-\mathrm{n}$ junction diode is unbiased,

If the $\mathrm{p}-\mathrm{n}$ junction diode is unbiased,
  1. n-type side has lower potential than p-type side.
  2. n-type side has same potential as p-type side.
  3. An electric field is established at the junction such that n side is at positive voltage relative to p -side.
  4. The potential across the junction is such that $p$-side is at positive voltage relative to n -side

Solution

n-type side has lower potential than p-type side: This is correct. The built-in electric field causes the p -side to have a higher potential than the n -side.

Asked in: MHT CET 2024 (16 May Shift 1)

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