Potential and electric field at an unbiased p-n junction

1. A.
   n-type side has lower potential than p-type side
2. B.
   n-type side has same potential as p-type side
3. C.
   An electric field is established at the junction such that n side is at positive voltage relative to p-side
4. D.
   The potential across the junction is such that p-side is at positive voltage relative to n-side

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1. A.
   the potential is same everywhere.
2. B.
   there is an electric field at the junction directed from the p-type side to the n-type side.
3. C.
   there is an electric field at the junction directed from the n-type side to p-type side.
4. D.
   the p-type side is at higher potential than the n-type side.

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