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Materials and Components

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

2
29
9
11

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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 resistance of a photoconductor

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

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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
The most important set of specifications of transformer oil include

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

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Materials and Components
Which inductor is used at high frequencies?

Iron alloy cored
Cast iron cored
Ceramic cored
Sheet steel cored

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