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  4. If Np and Ne be the numbers of holes and conduction electrons in an extrinsic semiconductor, then

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Q. If $N_{p}$ and $N_{e}$ be the numbers of holes and conduction electrons in an extrinsic semiconductor, then

Solution:

Correct answer is (d) $N_{p}>N_{e}$ or $N_{p} < N_{e}$ depending on the nature of impurity

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