MATERIALS AND COMPONENTS QUIZ

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

The superconducting property is not affected

The material may become an insulator

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

The superconducting property may be destroyed

TRUE ANSWER : ?
YOUR ANSWER : ?

A characteristic property of crystal is its periodicity of structure.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit for mmf is

T

V

Wb

A

TRUE ANSWER : ?
YOUR ANSWER : ?

In solid insulator materials having only one kind of atom, the types of polarization which exist are

Electronic and ionic

Electronic, ionic and permanent

Electronic only

TRUE ANSWER : ?
YOUR ANSWER : ?

Electric dipole moment is expressed in debye unit.

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 : ?

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

Ionic crystals

Ionic crystal, valence crystals and metals

Ionic and valence crystals

Ionic crystals, valence crystals, metal and vander wall crystals

TRUE ANSWER : ?
YOUR ANSWER : ?

Schrodinger wave equation is a

Linear equation

Differential equation

None of these

Partial differential equation

TRUE ANSWER : ?
YOUR ANSWER : ?

Spontaneous magnetisation is characteristic of ferromagnetic materials.

False

True

TRUE ANSWER : ?
YOUR ANSWER : ?

In an intrinsic semiconductor, at a given temperature T

Any of the above

The number of electron-hole pairs generated per second due to thermal motion is always less than the number of electron-hole pairs lost per second due to recombination

The number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination

The number of electron hole pairs generated per second due to thermal motion is always more than the number of electron-hole pairs lost per second due to recombination

TRUE ANSWER : ?
YOUR ANSWER : ?

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