ECAT Pre Engineering Physics Chapter 17 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 17 Physics of Solid

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Physics ECAT Pre Engineering Chapter 17 Physics of Solid

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Question # 1

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

Question # 2

A structure of polymeric solid is:

Question # 3

The smallest three dimensional basic structure in a crystalline solid is called

Question # 4

When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as

Question # 5

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

Question # 6

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

Question # 7

In a soft iron, domains are

Question # 8

The curie temperature of iron is about

Question # 9

The solids which has structure in-between order and disorder are called

Question # 10

The transition from solid to liquid is actually from:

Question # 11

In the phenomenon of hysteresis

Question # 12

The SI unit of strain is

Question # 13

The maximum stress that a material can withstand, is known as

Question # 14

The SI unit of stress is

Question # 15

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

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 In a semi-conductor material, the total current is
A. only the +ve current
B. only the electronic current
C. sum of +ve and electronic current
D. all 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 The force applied on unit area to produce any change in the shape, volume or length of a body is known as
A. strain
B. elasticity
C. stretching
D. stress
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 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
A. diamagnetic substances
B. ferromagnetic substances
C. paramagnetic substances
D. all of them
6 Within each domain, the magnetic field of all the spinning electrons are
A. parallel
B. antiparallel
C. perpendicular
D. all of them
7 The amplitude of oscillation of each atom in a metallic crystal rises with the
A. rise in temperature
B. decrease in temperature
C. even temperature remains constant
D. all of them
8 The temperature at which the vibrations become so great that structure of the Crystal breaks up, is called:
A. Critical temparature
B. Temperature of vaporization
C. Melting point
D. Both (A) and (C)
9 Under the elastic region, the deformation produced in the material, the deformation produced in the material will be
A. permanent
B. temporary
C. either of them
D. none of them
10 When a stress changes the shape, it is called the
A. compressional stress
B. tensile stress
C. shear stress
D. any one of them

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