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

The curie temperature of iron is about

Question # 3

The vast majority of solids are in the form of

Question # 4

The ratio of shearing stress/shearing strain is called as

Question # 5

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 # 6

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

Question # 7

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

Question # 8

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

Question # 9

Every crystalline solid has

Question # 10

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

Question # 11

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

Question # 12

The critical temperature of aluminium is

Question # 13

Amorphous solids:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 The substances which break just after the elastic limit is reached, are known as
A. brittle substances
B. ductile substances
C. plastic substances
D. elastic substances
2 Each atom in metal crystal:
A. Remains fixed
B. Vibrates about a fixed point
C. Moves randomly
D. Rotates about center of a crystal
3 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
4 In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:
A. Adhesive force
B. Nuclear forces
C. Inter atomic cohesive force
D. Electromagnetic force
5 The band above the valence band is called
A. high energy band
B. conduction band
C. empty band
D. none of them
6 The critical temperature of tin is
A. 1.18 K
B. 4.2 K
C. 3.72 K
D. 7.2 K
7 Arsenic, antimony and phosphorus are the elements from
A. third group
B. fourth group
C. fifth group
D. none of them
8 Any superconductor with critical temperature above 77 K, is referred as
A. low temperature superconductor
B. high temperature superconductor
C. very low temperature superconductor
D. none of them
9 Electrons of an isolated atom are bound to the nucleus, and
A. can only have distinct energy level
B. can only have same energy level
C. may or may not have distinct energy levels
D. none of these
10 The ratio of linear stress/linear strain is called as
A. Yong's modulus
B. Bulk modulus
C. Shear modulus
D. Modulus

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