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

Sum of residual resistivities of component metals
Product 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 be shifted in the direction of E by an amount which is independent 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
Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

In a direction anti parallel to magnetic field
In the same direction as current
Normal to both current and magnetic field
None of these

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