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electronics and communication engineering electronic devices and circuits
1. An extrinsic semiconductor sample has 6 billion silicon atoms and 3 million pentavalent impurity atoms. The number of electrons and holes is
(A): 3 million each
(B): 3 million free electrons and very small number of holes
(C): 3 million holes and very small number of free electrons
(D): 6 billion each
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By: guest on 02 Jun 2017 12.52 am
When pentavalent impurity is added, the number of fresh electrons is very large as compared to number of holes.
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