MATERIALS AND COMPONENTS QUIZ

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.

1, 2 and 3

1 and 2 only

1 and 3 only

2 and 3 only

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Permittivity same as that of air

Permittivity which is neither high nor low

High permittivity

Low permittivity

TRUE ANSWER : ?
YOUR ANSWER : ?

In a metal, the valence electrons

Either B or C

Are not shared

Are shared by all atoms

Are shared only between neighbouring atoms

TRUE ANSWER : ?
YOUR ANSWER : ?

Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

None of these

In a direction anti parallel to magnetic field

In the same direction as current

Normal to both current and magnetic field

TRUE ANSWER : ?
YOUR ANSWER : ?

As the atoms of rare gases become larger, electronic polarizability

Decreases

Remains the same

Increases

May increase or decrease

TRUE ANSWER : ?
YOUR ANSWER : ?

On the basis of the type of chemical bonds, solids may be classified into

Ionic crystal, valence crystals and metals

Ionic crystals

Ionic and valence crystals

Ionic crystals, valence crystals, metal and vander wall crystals

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit for mmf is

Wb

V

T

A

TRUE ANSWER : ?
YOUR ANSWER : ?

The number of protons in a silicon atom are

4

8

14

12

TRUE ANSWER : ?
YOUR ANSWER : ?

Ferrimagnetic materials have anti parallel orientation of equal moments of permanent dipoles.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

The phenomenon of dielectric hysteresis occurs with

None of these

DC

Both AC and DC

AC

TRUE ANSWER : ?
YOUR ANSWER : ?

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