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

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Materials and Components
Electrical contact materials used in switches, brushes, relay must possess

High thermal conductivity and high melting point
Low thermal conductivity and low melting pointL
High thermal conductivity and low melting point
Low thermal conductivity and high melting point

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

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

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