ECAT Pre Computer Science Chapter 17 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 17 Physics of Solids

Try The 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

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

Question # 2

The charged nucleus of an atom itself spins its magnetic field

Question # 3

The electrons in the outermost shell of an atom are called

Question # 4

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

Question # 5

The critical temperature of mercury is

Question # 6

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

Question # 7

When a stress changes the shape, it is called the

Question # 8

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

Question # 9

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

Question # 10

The curie temperature of iron is about

Question # 11

The neighbours of every molecule in crystalline solids are arranged in

Question # 12

Which of the following can become a good permanent magnet

Question # 13

The modulus of elasticity can be written as

Question # 14

The word amorphous means:

Question # 15

Semi-conductor elements have atoms with

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 The maximum stress that a material can withstand, is known as
A. plastic point
B. elastic limit
C. yield point
D. ultimate tensile strength
2 The charged nucleus of an atom itself spins its magnetic field
A. equal to the field produced by orbital electrons
B. greater than the field produced by orbital electrons
C. much weaker than the field produced by orbital electrons
D. none of these
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 When relatively simple molecules are chemically combined into massive molecules, the reaction is called:
A. Fission reaction
B. Fusion reaction
C. Polymerization
D. Any of these
5 The first super conductor was discovered in
A. 1811
B. 1890
C. 1901
D. 1911
6 Every crystalline solid has
A. definite melting point
B. different melting points
C. may or may not be definite
D. none of them
7 In a soft iron, domains are
A. easily oriented along external field and do not return to original random positions
B. easily oriented along external field and readily returns to originally random position
C. do no oriented along external field and also do not returns to originally random position
D. none of them
8 The measure of the deformation in a solid when stress is applied to its is called
A. elastic constant
B. young's modulus
C. strain
D. elasticity
9 The SI unit of stress is
A. N/m2
B. Nmc
C. dynes/m
D. N
10 The crystalline structure of NaCI is
A. rectangular
B. hexagonal
C. tetrahedral
D. cubical

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