question_answer

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

Correct Answer: C

Solution :

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.