1.

In extrinsic P and N-type, semiconductor materials, the ratio of the impurity atoms to the pure semiconductor atoms is about                                                                                    [MP PET 2003]

A. 1
B. \[{{10}^{-1}}\]
C. \[{{10}^{-4}}\]
D. \[{{10}^{-7}}\]
Answer» E.


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