In a $P N$-junction diode not connected to any circuit
A
The potential is the same everywhere
BThe $P$-type is a higher potential than the $N$-type side
CThere is an electric field at the junction directed from the $N$ type side to the $P$-type side
DThere is an electric field at the junction directed from the $P$ type side to the $N$-type side
[IIT-JEE 1998]
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CThere is an electric field at the junction directed from the $N$ type side to the $P$-type side
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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