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

Options

A. The potential is the same everywhere
B. The `P`-type is a higher potential than the `N`-type side
C. There is an electric field at the junction directed from the `N`-type side to the `P`-type side
D. There is an electric field at the junction directed from the `P`-type side to the `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