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Materials and Components

Materials and Components
Which inductor is used at high frequencies?

Sheet steel cored
Iron alloy cored
Cast iron cored
Ceramic cored

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Materials and Components
The most important set of specifications of transformer oil include

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

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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
The number of protons in a silicon atom are

8
4
14
12

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Materials and Components
As the viscosity of a liquid increases, the relaxation time

Remains constant
First decreases then increases
Increases
Decreases

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Materials and Components
In van der walls crystals, there exists a high degree of stability of the outer electron shell.

True
False

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