Discussion :: Electronic Devices and Circuits
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An extrinsic semiconductor sample has 6 billion silicon atoms and 3 million pentavalent impurity atoms. The number of electrons and holes is
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A.
3 million each
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B.
6 billion each
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C.
3 million free electrons and very small number of holes
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D.
3 million holes and very small number of free electrons
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Answer : Option C
Explanation :
When pentavalent impurity is added, the number of fresh electrons is very large as compared to number of holes.
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