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Materials and Components

Materials and Components
Spontaneous magnetisation is characteristic of ferromagnetic materials.

True
False

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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, ionic and permanent
Electronic and ionic
Electronic only

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Materials and Components
If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant.

True
False

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Materials and Components
Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied.

True
False

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Materials and Components
For making a capacitor it is better to have a dielectric having

Low permittivity
Permittivity which is neither high nor low
High permittivity
Permittivity same as that of air

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Materials and Components
The phenomenon of dielectric hysteresis occurs with

AC
DC
Both AC and DC
None of these

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