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.

2 and 3 only

1 and 2 only

1, 2 and 3

1 and 3 only

TRUE ANSWER : ?
YOUR ANSWER : ?

The number of protons in a copper atom are

11

9

2

29

TRUE ANSWER : ?
YOUR ANSWER : ?

The fact that domains exhibits spontaneous magnetisation is

Curie-Weiss law

Second hypothesis is of Weiss

First hypothesis is of Curie

Boltzmann’s statistics

TRUE ANSWER : ?
YOUR ANSWER : ?

Schrodinger wave equation is a

Differential equation

Linear equation

None of these

Partial differential equation

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit for mmf is

Wb

T

V

A

TRUE ANSWER : ?
YOUR ANSWER : ?

Debye temperature of metals is

About 10 K

About 200 K

About 600 K

About 2 K

TRUE ANSWER : ?
YOUR ANSWER : ?

In a metal, the valence electrons

Are not shared

Are shared by all atoms

Are shared only between neighbouring atoms

Either B or C

TRUE ANSWER : ?
YOUR ANSWER : ?

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

High thermal conductivity and high melting point

Low thermal conductivity and low melting pointL

Low thermal conductivity and high melting point

High thermal conductivity and low melting point

TRUE ANSWER : ?
YOUR ANSWER : ?

Many compounds also exhibit semiconducting properties.

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

The phenomenon of dielectric hysteresis occurs with

DC

None of these

Both AC and DC

AC

TRUE ANSWER : ?
YOUR ANSWER : ?

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