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

Amorphous solids are also called as

Question # 2

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 # 3

Polymers are the chemical combination of carbon with:

Question # 4

Semi-conductor elements have atoms with

Question # 5

When a stress changes the shape, it is called the

Question # 6

Synthetic materials fall into the category of

Question # 7

The cohesive forces between atoms, molecules or ions in crystalline solids maintain the strict

Question # 8

Every crystalline solid has

Question # 9

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

Question # 10

The word amorphous means:

Question # 11

Examples of crystalline solids are:

Question # 12

The vast majority of solids are in the form of

Question # 13

The electrons occupying the conduction band are known as

Question # 14

The pattern of NaCl particles have a shape which is :

Question # 15

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

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 The greatest stress that a material can endure without losing the proportionality between stress and strain is called
A. plastic line
B. breaking point
C. proportional limit
D. none of them
2 The smallest three dimensional basic structure in a crystalline solid is called
A. lattice point
B. crystal lattice
C. cubic crystal
D. unit cell
3 In a semi-conductor material, current flows due to
A. positive charge
B. negative charge
C. both of them
D. none of them
4 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
5 The ratio of linear stress/linear strain is called as
A. Yong's modulus
B. Bulk modulus
C. Shear modulus
D. Modulus
6 Amorphous solids:
A. Have definite melting points
B. Are called glassy solids
C. Have no definite melting point
D. Both (B) and (C)
7 If the stress increased beyond the elastic limit of the material. the deformation produced in the material will be
A. permanent
B. temporary
C. either of them
D. none of them
8 Each atom in metal crystal:
A. Remains fixed
B. Vibrates about a fixed point
C. Moves randomly
D. Rotates about center of a crystal
9 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
10 The molecules or ions in a crystalline solids are
A. static
B. not static
C. randomly moving
D. all of them

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