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Materials and Components

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

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

11
29
2
9

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Materials and Components
In a metal, the valence electrons

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

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Materials and Components
The resistance of a photoconductor

May increase or decrease with increase in light intensity
Increases with increase in light intensity
Decreases with increase in light intensity
Remains constant

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Materials and Components
On the basis of the type of chemical bonds, solids may be classified into

Ionic crystal, valence crystals and metals
Ionic crystals, valence crystals, metal and vander wall crystals
Ionic crystals
Ionic and valence crystals

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