Question

In a PN-junction diode not connected to any circuit

• 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 1

The correct option is C There is an electric field at the junction directed from the N- type side to the P- type side

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