Physics Semiconductor Electronics JEE (Main) / AIEEE Problems ( Previous Years ) MCQ (Single Correct)

In a P-N junction diode which is not connected to any circuit-

A
Potential is the same every where
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-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

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Text Solution

Verified by Experts
The correct answer is:
C

In an unbiased P-N junction diode, diffusion of charge carriers creates a depletion region and a built-in electric field.

This electric field is directed from the -side (positive donor ions) to the -side (negative acceptor ions).

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