Materials and Components
An atom of a rare gas is placed is an electric field E. Then

The nucleus will be shifted in the direction of E by an amount which is proportional to E.
The nucleus will be shifted in the direction of E by an amount which is independent of E.
The nucleus will be shifted in a direction opposite to that of E.
The nucleus will not be shifted.

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Materials and Components
At room temperature the number of conducting electrons in an intrinsic semiconductor

Is almost equal to the number of valence electrons
Is a very small fraction of the number of valence electrons
Is about half the number of valence electrons
Is small as compared to the number of valence electrons

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