ECAT Pre Computer Science Chapter 17 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 17 Physics of Solids

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ECAT Physics Chapter 17 Physics of Solids

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Question # 1

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

Question # 2

The solids which has structure in-between order and disorder are called

Question # 3

Each atom in a metal crystal vibrates about a fixed point with an amplitude that:

Question # 4

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

Question # 5

The critical temperature of tin is

Question # 6

When a stress changes the shape, it is called the

Question # 7

Examples of crystalline solids are:

Question # 8

The SI unit of strain is

Question # 9

There is a regular arrangement of molecules in a

Question # 10

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

Question # 11

There are some whose resistivity becomes zero below a certain temperature, called

Question # 12

Any superconductor with critical temperature above 77 K, is referred as

Question # 13

Examples of polymeric substances are:

Question # 14

A semi-conductor in its extremely pure form is known as

Question # 15

Each atom in metal crystal:

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as
A. impurification
B. adding
C. doping
D. extrinsivity
2 Amorphous solids are also called as
A. crystalline solids
B. polymeric solids
C. glassy solids
D. any one of them
3 Whenever a covalent bond is broken in an intrinsic semi-conductor
A. hole is created
B. an electron is created
C. an electron-hole pair is generated
D. all of them
4 There is a regular arrangement of molecules in a
A. amorphous solids
B. polymeric solids
C. crystalline solids
D. none of them
5 The pattern of crystalline solid is:
A. One dimesional
B. Two dimensional
C. Three dimensional
D. None of these
6 In metallic crystals which of the following thing remains constant
A. amplitude of oscillations
B. temperature of solid
C. average atomic positions
D. all of them
7 Lead, copper and wrought iron are examples of
A. brittle substances
B. ductile substances
C. plastic substances
D. elastic substances
8 The vast majority of solids are in the form of
A. amorphous structure
B. polymeric structure
C. crystalline structure
D. all of them
9 The ratio of shearing stress/shearing strain is called as
A. Modulus
B. Pascal modulus
C. Hooker's modulus
D. Shear modulus
10 Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called
A. tiny regions
B. domains
C. vectors
D. none of them

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