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Materials and Components

Materials and Components
The number of protons in a silicon atom are

14
12
4
8

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Materials and Components
The phenomenon of dielectric hysteresis occurs with

DC
None of these
Both AC and DC
AC

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Materials and Components
The unit for mmf is

T
V
A
Wb

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Materials and Components
In a metal, the valence electrons

Are not shared
Are shared only between neighbouring atoms
Are shared by all atoms
Either B or C

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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.

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

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

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

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