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Materials and Components

Materials and Components
Debye temperature of metals is

About 200 K
About 10 K
About 2 K
About 600 K

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Materials and Components
Which of the following are true for relative dielectric constant?1. It is dimensionless.2. It is equal to 1 for vacuum.3. It is equal to 1 for all substances.

2 and 3 only
1, 2 and 3
1 and 2 only
1 and 3 only

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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
Permittivity same as that of air
High permittivity

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Materials and Components
The merger of hole and free electron is called

Free electrons
Thermal energy
Recombination
Covalent bonding

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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
The most important set of specifications of transformer oil include

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

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