MATERIALS AND COMPONENTS QUIZ

The resistance of a photoconductor

Increases with increase in light intensity

May increase or decrease with increase in light intensity

Decreases with increase in light intensity

Remains constant

TRUE ANSWER : ?
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The residual resistivity of a binary alloy at 0 K is

Difference of residual resistivities of component metals

Sum of residual resistivities of component metals

Dependent on the concentration of minor component in the alloy

Product of residual resistivities of component metals

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YOUR ANSWER : ?

The number of protons in a silicon atom are

12

8

4

14

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Which inductor is used at high frequencies?

Sheet steel cored

Cast iron cored

Ceramic cored

Iron alloy cored

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Debye temperature of metals is

About 600 K

About 10 K

About 200 K

About 2 K

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For making a capacitor it is better to have a dielectric having

Low permittivity

Permittivity same as that of air

Permittivity which is neither high nor low

High permittivity

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The phenomenon of dielectric hysteresis occurs with

DC

None of these

Both AC and DC

AC

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In a metal, the valence electrons

Are not shared

Either B or C

Are shared only between neighbouring atoms

Are shared by all atoms

TRUE ANSWER : ?
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Ferrimagnetic materials have anti parallel orientation of equal moments of permanent dipoles.

False

True

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As the viscosity of a liquid increases, the relaxation time

Remains constant

Increases

Decreases

First decreases then increases

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