ECAT Pre General Science Physics Chapter 17 Physics of Solids

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  • Chapter NameCh 17 - Physics of Solids

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 bands below the valence band are

Question # 2

An atom in which there is a resultant magnetic field, behaves like a tiny magnet and is called as

Question # 3

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

Question # 4

The word amorphous means:

Question # 5

The bonding between the semi-conductor materials is

Question # 6

The electrons in the outermost shell of an atom are called

Question # 7

Lead, copper and wrought iron are examples of

Question # 8

Examples of crystalline solids are:

Question # 9

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

Question # 10

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

Question # 11

When a stress changes length, it is called the

Question # 12

On heating, glass gradually softens into a paste like before it becomes a very viscous liquid at almost

Question # 13

The doped semi-conductor materials are known as

Question # 14

When the shear stress and shear stain are involved, then their ratio is called

Question # 15

The force which maintain the strict long-range order between atoms of a crystalline solid is the:

Question # 16

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

Question # 17

The ability of the body to return to its original shape is called

Question # 18

Glass is an example of

Question # 19

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

Question # 20

The band above the valence band is called

Question # 21

The conduction band in a solid

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

Question # 23

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

Question # 24

Examples of polymeric substances are:

Question # 25

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

Question # 26

Amorphous solids are also more like

Question # 27

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

Question # 28

Synthetic materials fall into the category of

Question # 29

The SI unit of stress is

Question # 30

Tick the one which is not a crystalline solid:

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