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

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ECAT Pre General Science Physics Chapter 17 Physics of Solids

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Question # 1

Each atom in metal crystal:

Question # 2

The critical temperature of aluminium is

Question # 3

Examples of crystalline solids are:

Question # 4

The first super conductor was discovered in

Question # 5

When a stress changes the shape, it is called the

Question # 6

The vast majority of solids are in the form of

Question # 7

Lead, copper and wrought iron are examples of

Question # 8

The electrons in the outermost shell of an atom are called

Question # 9

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

Question # 10

Electrons of an isolated atom are bound to the nucleus, and

Question # 11

The results of mechanical tests are usually expressed in terms of

Question # 12

A unit cell is smallest basic structure which is:

Question # 13

When a stress changes length, it is called the

Question # 14

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

Question # 15

When a silicon crystal is doped with a pentavalent element, then the atom of the pentavalent element is known as

Question # 16

In a semi-conductor material, the total current is

Question # 17

Polymers are the chemical combination of carbon with:

Question # 18

The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as

Question # 19

Amorphous solids are also called as

Question # 20

In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as

Question # 21

The magnetism produced by electrons within an atom can arise from

Question # 22

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

Question # 23

There is a regular arrangement of molecules in a

Question # 24

The neighbours of every molecule in crystalline solids are arranged in

Question # 25

In a semi-conductor material, current flows due to

Question # 26

The transition from solid state to liquid state is:

Question # 27

In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:

Question # 28

When relatively simple molecules are chemically combined into massive molecules, the reaction is called:

Question # 29

Which of the following can become a good temporarily magnet

Question # 30

The greatest stress that a material can endure without losing the proportionality between stress and strain is called

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 Above the curie temperature, iron becomes
A. ferromagnetic
B. paramagnetic
C. diamagnetic
D. any one of them
2 The word amorphous means:
A. Without any structure
B. With definite structure
C. Regular arrangement of molecules
D. Both (B) and (C)
3 The substance in which atoms cooperate with each other in such a way so as to exhibit a strong magnetic effect, are called
A. diamagnetic substances
B. ferromagnetic substances
C. paramagnetic substances
D. all of them
4 The arrangement or molecules or atoms in a crystalline solid can be studied by using:
A. Chemical methods
B. Neutrons
C. X-ray techniques
D. Copper atoms
5 In the doping process, the ratio of the doping atoms to the semi conductor atom is
A. 1 to 10
B. 1 to 103
C. 1 to 106
D. 1 to 109
6 The curie temperature of iron is about
A. 250°C
B. 500°C
C. 750°C
D. 1000°C
7 A unit cell is smallest basic structure which is:
A. One dimensional
B. Two dimensional
C. Three dimensional
D. Four dimensional
8 The SI unit of stress is
A. N/m2
B. Nmc
C. dynes/m
D. N
9 The modulus of elasticity can be written as
A. stress x strain
B. strain/stress
C. 1/2 x stress x strain
D. stress/strain
10 In a cubic crystal, All solids meet at:
A. 60o
B. 90o
C. 109o
D. 30o

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