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.