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

There are some whose resistivity becomes zero below a certain temperature, called

Question # 2

The valence band of an atom in a solid

Question # 3

If the stress increased beyond the elastic limit of the material. the deformation produced in the material will be

Question # 4

Glass is an example of

Question # 5

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

Question # 6

In a semi-conductor material, current flows due to

Question # 7

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

Question # 8

When a stress changes the shape, it is called the

Question # 9

The results of mechanical tests are usually expressed in terms of

Question # 10

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

Question # 11

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

Question # 12

Above the curie temperature, iron becomes

Question # 13

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

Question # 14

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

Question # 15

The pattern of NaCl particles have a shape which is :

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ECAT Physics Chapter 17 Important MCQ's

Sr.# Question Answer
1 The smallest three dimensional basic structure is called as:
A. An atom
B. Unit cell
C. Crystal lattice
D. Polymer
2 Which of the following theory completely explain the three types of materials
A. Bohr model of electron distribution
B. Rutherford atomic model
C. Pauli's exclusion principle
D. energy band theory
3 The ratio of linear stress/linear strain is called as
A. Yong's modulus
B. Bulk modulus
C. Shear modulus
D. Modulus
4 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
5 The bands below the valence band are
A. completely filled and play active part in conduction process
B. completely filled and plays no part in conduction process
C. completely filled and play active part in conduction process
D. not completely filled and play no part in conduction process
6 When the shear stress and shear stain are involved, then their ratio is called
A. Young's modulus
B. Bulk modulus
C. Shear modulus
D. all of them
7 When a stress changes length, it is called the
A. compressional stress
B. tensile stress
C. shear stress
D. any one of them
8 The SI unit of strain is
A. N
B. Dynes
C. Pascal
D. Dimensionless
9 A semi-conductor in its extremely pure form is known as
A. extrinsic semi-conductor
B. intrinsic semi-conductor
C. either of them
D. none of them
10 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

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