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

Question # 2

Amorphous solids:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

The modulus of elasticity can be written as

Question # 7

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

Question # 8

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

Question # 9

In a cubic crystal, All solids meet at:

Question # 10

A unit cell is smallest basic structure which is:

Question # 11

When a stress changes length, it is called the

Question # 12

A structure of polymeric solid is:

Question # 13

When a stress changes the shape, it is called the

Question # 14

Synthetic materials fall into the category of

Question # 15

The valence band of an atom in a solid

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 Examples of crystalline solids are:
A. Cooper
B. NaCl
C. Zirconia
D. Both (A) and (B)
2 There are some whose resistivity becomes zero below a certain temperature, called
A. absolute zero
B. 0°C
C. critical temperature
D. lower fixed point
3 Within each domain, the magnetic field of all the spinning electrons are
A. parallel
B. antiparallel
C. perpendicular
D. all of them
4 Tick the one which is not a crystalline solid:
A. Zirconia
B. Glass
C. Copper
D. Ceramic solid
5 The size of the domain is such that they can contain
A. 102to 104atoms
B. 104 to 108atoms
C. 108to 1012atoms
D. 1012to 1016atoms
6 The materials in which there are plenty of free electrons for electrical conduction are known as
A. conductors
B. insulators
C. semi-conductors
D. all of them
7 Above the curie temperature, iron becomes
A. ferromagnetic
B. paramagnetic
C. diamagnetic
D. any one of them
8 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
9 The curie temperature of iron is about
A. 250°C
B. 500°C
C. 750°C
D. 1000°C
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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