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

The solids are classified as:

Question # 2

Which of the following can become a good permanent magnet

Question # 3

The SI unit of stress is

Question # 4

The bonding between the semi-conductor materials is

Question # 5

The domains are of macroscopic size of the order of

Question # 6

The materials in which there are plenty of free electrons for electrical conduction are known as

Question # 7

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

Question # 8

The measure of the deformation in a solid when stress is applied to its is called

Question # 9

If the stress increased beyond the elastic limit of the material. the deformation produced in the material will be

Question # 10

The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called

Question # 11

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

Question # 12

In a cubic crystal, All solids meet at:

Question # 13

Which of the following theory completely explain the three types of materials

Question # 14

The size of the domain is such that they can contain

Question # 15

When a stress changes length, it is called the

Question # 16

A structure of polymeric solid is:

Question # 17

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

Question # 18

The number of different crystals systems based on the geometrical arrangement of their atoms and the resultant geometrical structure are

Question # 19

The bands below the valence band are

Question # 20

Zirconia is classified as:

Question # 21

Tick the one which is not polymer solid:

Question # 22

The whole structure obtained by the repetition of unit cells is called:

Question # 23

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

Question # 24

Substances which break just after the elastic limit is reached, are known as

Question # 25

Synthetic materials fall into the category of

Question # 26

Glass and high carbon steel are the examples of

Question # 27

In a semi-conductor material, current flows due to

Question # 28

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

Question # 29

When a stress changes the shape, it is called the

Question # 30

In a semi-conductor material, the total current is

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 A unit cell is smallest basic structure which is:
A. One dimensional
B. Two dimensional
C. Three dimensional
D. Four dimensional
2 The whole structure obtained by the repetition of unit cells is called:
A. Crystal lattice
B. Amorphous solid
C. Polymeric solid
D. Polysterne
3 Experiments revealed that the ratio of the stress to the strain is a constant value for
A. different material
B. all materials
C. a given material
D. all of them
4 The crystalline structure of NaCI is
A. rectangular
B. hexagonal
C. tetrahedral
D. cubical
5 The critical temperature of mercury is
A. 1.18 K
B. 4.2 K
C. 3.72 K
D. 7.2 K
6 The curie temperature of iron is about
A. 250°C
B. 500°C
C. 750°C
D. 1000°C
7 The electrons in the outermost shell of an atom are called
A. core electrons
B. valence electrons
C. high energy electrons
D. none of them
8 The valence band of an atom in a solid
A. is always empty
B. may or may not be empty
C. can never be empty
D. none of them
9 The molecules or ions in a crystalline solids are
A. static
B. not static
C. randomly moving
D. all of them
10 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

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