Materials and Components
The fact that domains exhibits spontaneous magnetisation is

Boltzmann’s statistics
First hypothesis is of Curie
Second hypothesis is of Weiss
Curie-Weiss law

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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 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.
The nucleus will be shifted in the direction of E by an amount which is proportional to E.

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

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

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