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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Materials and Components
An atom of a rare gas is placed is an electric field E. Then

The nucleus will be shifted in a direction opposite to that of E.
The nucleus will be shifted in the direction of E by an amount which is independent of E.
The nucleus will not be shifted.
The nucleus will be shifted in the direction of E by an amount which is proportional to E.

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Materials and Components
Electrical contact materials used in switches, brushes, relay must possess

Low thermal conductivity and high melting point
High thermal conductivity and low melting point
High thermal conductivity and high melting point
Low thermal conductivity and low melting pointL

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