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

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Materials and Components
In an intrinsic semiconductor, at a given temperature T

Any of the above
The number of electron-hole pairs generated per second due to thermal motion is always less than the number of electron-hole pairs lost per second due to recombination
The number of electron hole pairs generated per second due to thermal motion is always more than the number of electron-hole pairs lost per second due to recombination
The number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination

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