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Materials and Components

Materials and Components
Electric dipole moment is expressed in debye unit.

False
True

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Materials and Components
In solid insulator materials having only one kind of atom, the types of polarization which exist are

Electronic and ionic
Electronic, ionic and permanent
Electronic only

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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
The elements which become superconducting at extremely low temperatures are

Good conductors at room temperature
Ferromagnetic at room temperature
Relatively poor conductors at room temperature
Insulators at room temperature

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Materials and Components
A vacant electronic state moves in the same direction as would a positive charge carrier.

False
True

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Materials and Components
The most important set of specifications of transformer oil include

dielectric strength and flash point
dielectric strength and viscosity
viscosity and flash point
flash point and viscosity

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