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MCQ Practice Question

Electronic Devices & Circuits Semiconductor Fundamentals

For a semiconductor, conductivity sigma is approximately q(n mu_n + p mu_p). If electron concentration increases while mobilities and hole concentration remain unchanged, conductivity generally?

AIncreases
BDecreases
CBecomes zero
DRemains exactly unchanged

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Correct Answer: A. Increases

Explanation: The electron term q n mu_n increases with electron concentration, so total conductivity increases under the stated assumptions.

Reference: Standard semiconductor electronics: conductivity

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