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

The amplitude of oscillation of each atom in a metallic crystal rises with the

Question # 2

In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:

Question # 3

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

Question # 4

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

Question # 5

In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as

Question # 6

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

Question # 7

In a semi-conductor material, the total current is

Question # 8

Polymers are the chemical combination of carbon with:

Question # 9

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 # 10

The critical temperature of tin is

Question # 11

Which of the following theory completely explain the three types of materials

Question # 12

The band above the valence band is called

Question # 13

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

Question # 14

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

Question # 15

The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 The SI unit of stress is
A. N/m2
B. Nmc
C. dynes/m
D. N
2 An ordinary glass gradually softens into a 'paste -like' state before it becomes a very viscous liquid. It happens almost at:
A. 800oC
B. 500oC
C. 300oC
D. 100oC
3 Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at
A. 125 K
B. 25 K
C. 263 K
D. 163 K
4 The SI unit of strain is
A. N
B. Dynes
C. Pascal
D. Dimensionless
5 Glass and high carbon steel are the examples of
A. brittle substances
B. ductile substances
C. plastic substances
D. elastic substances
6 The modulus of elasticity can be written as
A. stress x strain
B. strain/stress
C. 1/2 x stress x strain
D. stress/strain
7 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
8 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
9 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
10 The first super conductor was discovered in
A. 1811
B. 1890
C. 1901
D. 1911

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