MATERIALS AND COMPONENTS QUIZ

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

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

When a material is in superconducting state and a magnetic field is applied

The superconducting property may be destroyed

The superconducting property may be affected and resistivity may increase from zero to a low value

The superconducting property is not affected

The material may become an insulator

TRUE ANSWER : ?
YOUR ANSWER : ?

A characteristic property of crystal is its periodicity of structure.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

Electric dipole moment is expressed in debye unit.

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

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

High thermal conductivity and high melting point

High thermal conductivity and low melting point

Low thermal conductivity and low melting pointL

Low thermal conductivity and high melting point

TRUE ANSWER : ?
YOUR ANSWER : ?

The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as

Curie rule

Debye rule

Matthiessen’s rule

Onne’s rule

TRUE ANSWER : ?
YOUR ANSWER : ?

As the atoms of rare gases become larger, electronic polarizability

Decreases

Remains the same

May increase or decrease

Increases

TRUE ANSWER : ?
YOUR ANSWER : ?

The residual resistivity of a binary alloy at 0 K is

Dependent on the concentration of minor component in the alloy

Difference of residual resistivities of component metals

Sum of residual resistivities of component metals

Product of residual resistivities of component metals

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit for mmf is

T

Wb

A

V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?