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The un-neutralised ions in the neighbourhood of the junction are known as

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The un-neutralised ions in the neighbourhood of the junction are known as

(a) Depletion charges

(b) Uncovered charges

(c) Mobile ions

(d) Counter ions

I have been asked this question in an internship interview.

Origin of the question is Qualitative Theory of the p-n junction topic in division Semiconductor-Diode Characteristics of Electronic Devices & Circuits

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Correct choice is (b) Uncovered charges

Explanation: The un-neutralised ions in the neighbourhood of the junction are known as uncovered ions because they are not mobile.

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