In unbiased p-n junction diode (a) the potential is same everywhere. (b) there is an electric field at the junction directed from the p -type side to the n -type side. (c) there is an electric field at the junction directed from the n -type side to p -type side. (d) the p-type side is at higher potential than the n-type side.

Answer: (c). Electrons diffuse from n to p and holes from p to n, leaving + ions on the n side and - ions on the p side. So the n side is at a higher potential, and the field at the junction points from + (n side) to - (p side). So the answer is (c).

In unbiased p-n junction diode | MHT CET 2025 (19 Apr, Shift 2)

Q30MHT CET 2025 · 19 APR · SHIFT 2Medium

P-N Junction Diode

In unbiased p-n junction diode

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Answer: (c)

Electrons diffuse from n to p and holes from p to n, leaving $+$ ions on the n side and $-$ ions on the p side.
So the n side is at a higher potential, and the field at the junction points from $+$ (n side) to $-$ (p side).
So the answer is (c).

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