MATERIALS AND COMPONENTS QUIZ

Which inductor is linear?

Cast iron cored

Iron alloy cored

Air cored

Sheet steel cored

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

The nucleus will not be shifted.

The nucleus will be shifted in the direction of E by an amount which is independent of E.

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 proportional to E.

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Electrical contact materials used in switches, brushes, relay must possess

High thermal conductivity and low melting point

High thermal conductivity and high melting point

Low thermal conductivity and low melting pointL

Low thermal conductivity and high melting point

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In a metal, the valence electrons

Are shared only between neighbouring atoms

Are not shared

Either B or C

Are shared by all atoms

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Spontaneous magnetisation is characteristic of ferromagnetic materials.

False

True

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The phenomenon of dielectric hysteresis occurs with

DC

Both AC and DC

None of these

AC

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Schrodinger wave equation is a

Differential equation

Linear equation

None of these

Partial differential equation

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The resistance of a photoconductor

May increase or decrease with increase in light intensity

Remains constant

Decreases with increase in light intensity

Increases with increase in light intensity

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The number of protons in a silicon atom are

14

8

12

4

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Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied.

True

False

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