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

Any of the above
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
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

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Materials and Components
The residual resistivity of a binary alloy at 0 K is

Product of residual resistivities of component metals
Sum of residual resistivities of component metals
Dependent on the concentration of minor component in the alloy
Difference of residual resistivities of component metals

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

The nucleus will be shifted in a direction opposite to that of E.
The nucleus will not be shifted.
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.

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