ECAT Pre General Science Chapter 17 online mcq test with answers for Physics chapter 17 (Physics of Solids)

Question # 1

Ferromagnetic substances lose their magnetism when heated above a certain temperature, known as

critical temperature A
curie temperature B
high temperature C
fixed temperature D

Question # 2

The force applied on unit area to produce any change in the shape, volume or length of a body is known as

strain A
elasticity B
stretching C
stress D

Question # 3

The critical temperature of tin is

1.18 K A
4.2 K B
3.72 K C
7.2 K D

Question # 4

When a large number of atoms are brought close to one another to form a solid, each energy level of an isolated atom splits into sub-levels, called

energy bands A
energy shells B
states C
all of them D

Question # 5

The electrons in the outermost shell of an atom are called

core electrons A
valence electrons B
high energy electrons C
none of them D

Question # 6

The substance in which atoms cooperate with each other in such a way so as to exhibit a strong magnetic effect, are called

diamagnetic substances A
ferromagnetic substances B
paramagnetic substances C
all of them D

Question # 7

The charged nucleus of an atom itself spins its magnetic field

equal to the field produced by orbital electrons A
greater than the field produced by orbital electrons B
much weaker than the field produced by orbital electrons C
none of these D

Question # 8

Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at

125 K A
25 K B
263 K C
163 K D

Question # 9

Within each domain, the magnetic field of all the spinning electrons are

parallel A
antiparallel B
perpendicular C
all of them D

Question # 10

The maximum stress that a material can withstand, is known as

plastic point A
elastic limit B
yield point C
ultimate tensile strength D

Question # 11

When a silicon crystal is doped with a pentavalent element, such an extrinsic semi-conductor is called

p-type semi-conductor A
n-type semi-conductor B
either of them C
none of them D

Question # 12

In a soft iron, domains are

easily oriented along external field and do not return to original random positions A
easily oriented along external field and readily returns to originally random position B
do no oriented along external field and also do not returns to originally random position C
none of them D

Question # 13

The arrangement or molecules or atoms in a crystalline solid can be studied by using:

Chemical methods A
Neutrons B
X-ray techniques C
Copper atoms D
Both (A) and (B) E

Question # 14

Which of the following can become a good temporarily magnet

iron A
steel B
both of them C
none of them D

Question # 15

The word amorphous means:

Without any structure A
With definite structure B
Regular arrangement of molecules C
Both (B) and (C) D
None of these E

Question # 16

The temperature at which the vibrations become so great that structure of the Crystal breaks up, is called:

Critical temparature A
Temperature of vaporization B
Melting point C
Both (A) and (C) D
Both (A) and (B) E

Question # 17

Semi-conductor elements have atoms with

2 valence electrons A
3 valence electrons B
4 valence electrons C
5 valence electrons D

Question # 18

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

tiny regions A
domains B
vectors C
none of them D

Question # 19

Under the elastic region, the deformation produced in the material, the deformation produced in the material will be

permanent A
temporary B
either of them C
none of them D

Question # 20

Lead, copper and wrought iron are examples of

brittle substances A
ductile substances B
plastic substances C
elastic substances D

Question # 21

The ratio of linear stress/linear strain is called as

Yong's modulus A
Bulk modulus B
Shear modulus C
Modulus D

Question # 22

The substance in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero,are called

diamagnetic substances A
ferromagnetic substances B
paramagnetic substances C
all of them D

Question # 23

The SI unit of stress is

N/m² A
Nmc B
dynes/m C
N D

Question # 24

The bonding between the semi-conductor materials is

covalent A
ionic B
either of them C
none of them D

Question # 25

Polymers are the chemical combination of carbon with:

Nitrogen A
Oxygen B
Hydrogen C
All of these D
None of these E

Question # 26

In the doping process, the ratio of the doping atoms to the semi conductor atom is

1 to 10 A
1 to 10³ B
1 to 10⁶ C
1 to 10⁹ D

Question # 27

The cohesive forces between atoms, molecules or ions in crystalline solids maintain the strict

short range order A
long range order B
both of them C
none of them D

Question # 28

The results of mechanical tests are usually expressed in terms of

stress A
strain B
stress and strain C
neither strees nor strain D

Question # 29

The electrons occupying the conduction band are known as

conduction electrons A
free electrons B
both of them C
none of them D

Question # 30

Zirconia is classified as:

Ceramic solid A
Ionic compound B
Metal C
Either (A) or (B) D
Either (B) or (C) E

Sr.#	Question	Answer
1	When the shear stress and shear stain are involved, then their ratio is called	A. Young's modulus B. Bulk modulus C. Shear modulus D. all of them
2	The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called	A. diamagnetic substances B. ferromagnetic substances C. paramagnetic substances D. all of them
3	Synthetic materials fall into the category of	A. crystalline solids B. amorphous C. polymeric solids D. all of them
4	The substance in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero,are called	A. diamagnetic substances B. ferromagnetic substances C. paramagnetic substances D. all of them
5	The measure of the deformation in a solid when stress is applied to its is called	A. elastic constant B. young's modulus C. strain D. elasticity
6	The force applied on unit area to produce any change in the shape, volume or length of a body is known as	A. strain B. elasticity C. stretching D. stress
7	The critical temperature of mercury is	A. 1.18 K B. 4.2 K C. 3.72 K D. 7.2 K
8	The neighbours of every molecule in crystalline solids are arranged in	A. an irregular manner B. a regular manner C. any manner D. none of them
9	The doped semi-conductor materials are known as	A. intrinsic semi-conductor B. extrinsic semi-conductor C. either of them D. none of them
10	Within each domain, the magnetic field of all the spinning electrons are	A. parallel B. antiparallel C. perpendicular D. all of them

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ECAT Pre General Science Physics Chapter 17 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 17 Physics of Solids

ECAT Pre General Science Physics Chapter 17 Physics of Solids