Question

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

• A. the potential is the same everywhere
• B. the p-type side is at a higher potential than the n-type side
• C. there is an electric field at the junction directed from the n-side to the p-side
• D. there is an electric field at the junction directed from the p-type side to the n-type side

Answer 1

Answer: (C)

At the 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 the p-side.