Q. In a p-n junction diode not connected to any circuit
A) The potential is the same everywhere
B) The p-type side has a higher potential than the $n$-type side
C) There is an electric field at the junction directed from the $n$-type side to $p$-type side
D) There is an electric field at the junction directed from the $p$-type side to $n$-type side
Explanation
(c) At junction a potential barrier/depletion layer is formed with $n$-side at higher potential and $p$-side at lower potential. Therefore, there is an electric field at the junction directed from the $n$-side to $p$-side.
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.