In a p - n junction diode , not connected to any circuit

Options

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 .

Answer

C

Explanation

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.