Physics Of Solids Online Mcqs Test

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Question 1

1. What is the SI unit of modulus of elasticity of substance?

Answer

Being a number it has no unit.

Question 2

2. Which one of the following physical quantities does not have the dimensions of force per unit area?

Answer

Young’s modulus

Question 3

3. A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by

Answer

Stress/strain

Answer

(stress/strain)

Answer

Stress x strain

Answer

(Stress/strain)

Question 4

4. The ration stress to strain in young’s modulus of the material then tension is

Answer

Directly proportional to extension

Answer

Directly proportional to strain

Answer

Directly proportional to square of amplitude

Answer

Inversely proportional to extension

Question 5

5. A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is

Answer

The extension of the wire is proportional to the force applied

Answer

The weight of the wire is negligible

Answer

The wire is not stretched beyond its elastic limit

Answer

The cross sectional area of the wire remains constant

Question 6

6. Any alteration produced in shapes length or volume when a body is subjected to some external force is called

Answer

Deformation

Question 7

7. The breaking of crystals along definite direction is called

Answer

Homogeneity

Question 8

8. If the density of atoms remain same along any direction in a crystal is called

Answer

Homogeneity

Question 9

9. The energy band occupied by the valence electrons is called

Answer

Energy state

Answer

Valence band

Answer

Ve-energy state

Answer

Conduction band

Question 10

10. Materials in which valence electrons are tightly bound to their atoms at low temperature are called

Answer

Semi conductor

Answer

Super conductor

Answer

Insulators

Question 11

11. The band theory of solids explains satisfactorily the nature of

Answer

Electrical insulators alone

Answer

Electrical conductors alone

Answer

Electrical semi-conductors alone

Answer

All of these

Question 12

12. A vacant or partially filled band is called

Answer

Conduction band

Answer

Valence band

Answer

Forbidden band

Answer

Empty band

Question 13

13. A completely filled band is called

Answer

Conduction band

Answer

Valence band

Answer

Forbidden band

Question 14

14. The electrons in conduction band are free to

Answer

Transport vibrations

Answer

Transport signals

Answer

Transport charge

Answer

Transport impulses

Question 15

15. Which one has the greatest energy gap?

Answer

Semi conductor

Answer

None metals

Question 16

16. With increase in temperature the electrical conductivity of intrinsic semi-conductor

Answer

Remains same

Answer

First increases then decreases

Question 17

17. Holes can exist in

Answer

Conductors

Answer

Insulators

Answer

Semi-conductors

Answer

All of these

Question 18

18. On the basis of band theory of solids the semiconductors have

Answer

A party filled valence band and totally empty conduction band

Answer

A completely filled valence band a totally empty conduction band and a very wide forbidden band

Answer

A completely filled valence band a partially filled conduction and a narrow forbidden band

Answer

A partly filled valence band a totally empty conduction band and a wide forbidden band

Question 19

19. In a semiconductors the charge carriers are

Answer

Holes only

Answer

Electrons only

Answer

Electron and holes both

Answer

All of these

Question 20

20. Very weak magnetic fields are detected by

Answer

Magnetic resonance imaging (MRI)

Answer

Magnetometer

Answer

Oscilloscope

Question 21

21. Energy needed to magnetize and demagnetize is represented by

Answer

Hysteresis curve

Answer

Hysteresis loop area

Answer

Hysteresis loop

Answer

Straight line

Question 22

22. Polythene, polystyrene and nylon are examples of

Answer

Polymeric solids

Answer

Crystalline solids

Answer

Glassy solids

Answer

Amorphous solids

Question 23

23. Crystalline solids have the properties such as

Answer

Regular arrangement

Answer

Covalent bonding

Answer

Some what defective

Answer

All of these

Question 24

24. The whole structure obtained by the repetition of unit cell is known as

Answer

Crystal lattice

Answer

All of these

Question 25

25. The metals become electrically conducting due to their

Answer

All of these

Question 26

26. The measure of deformation of a solid when stress is applied to it is called

Answer

None of these

Question 27

27. The atoms molecules or ions in a crystalline solids are at room temperature

Answer

Motionless

Answer

Vibrate violently

Answer

Simply vibrate

Question 28

28. The ratio of applied stress to volumetric strain is called

Answer

Shear modulus

Answer

Young’s modulus

Answer

Bulk modulus

Answer

None of these

Question 29

29. While vibrating the atoms are at their

Answer

Fixed positions

Answer

Extreme position

Answer

Average positions

Answer

None of these

Question 30

30. In between two consecutive permissible energy bands, there is a range of energy states which cannot be occupied by electrons. These are called

Answer

Hidden energy states

Answer

Forbidden energy states

Answer

Band levels

Answer

None of these

Question 31

31. At higher temperature their vibrations become so great that structure suddenly breaks up and changes into

Answer

Order to disorder

Answer

Solid into liquid

Answer

All of these

Question 32

32. A substance which have empty conduction band is called

Answer

Semiconductor

Answer

None of these

Question 33

33. Amorphous materials have the properties of solid like

Answer

No structure

Answer

Like liquid

Question 34

34. Arsenic, antimony or phosphorus are impurities for

Answer

may be p-type or n—type

Answer

None of these

Question 35

35. The amorphous material (solids) have

Answer

No structure

Answer

No melting points

Answer

Partially crystalline solids

Answer

All of these

Question 36

36. Polymeric solids have the structure

Answer

One dimensional

Answer

Two dimensional

Answer

Zero dimensional

Answer

Three dimensional

Question 37

37. Unit cell has a basic structure of

Answer

One dimensional

Answer

Two dimensional

Answer

Three dimensional

Answer

None of these

Question 38

38. In a semiconductor, the mobility of holes is

Answer

Greater than electrons

Answer

Less than electrons

Answer

Equal to electrons

Answer

None of these

Question 39

39. The shape of crystals other than a cube have

Answer

Right angles

Answer

Not right angles

Answer

Not corners

Answer

None of these

Question 40

40. How many oxygen atoms are in Yttrium barium copper oxide?

Question 41

41. Examples of crystalline solids are

Answer

All of these

Question 42

42. Polymers have chemically combinations with

Answer

All of these

Question 43

43. The deformation produced in the body by an applied force in their

Answer

All of these

Question 44

44. In forward bias, the width of potential barrier in a p-n junction diode

Answer

Remains constant

Answer

First A and B

Question 45

45. The ability of a body to return to its original shape when applied force is removed is called

Answer

Elasticity

Answer

All of these

Question 46

46. Which of the following when added as a n impurity into the silicon produces n-type semi-conductor?

Question 47

47. When a stress changes its length it is called

Answer

Tensile stress

Answer

Shear stress

Answer

None of these

Question 48

48. Two inputs of NAND gates are shorted. This gate is equivalent to

Question 49

49. When a stress change its shape it is called

Answer

Tensile stress

Answer

Shear stress

Answer

Volume stress

Answer

None of these

Question 50

50. Which logic gate is represented by following diagram?

Question 51

51. The measure of the deformation of a solid is called

Answer

Elastic constant

Answer

None of these

Question 52

52. How many types of strain is

Question 53

53. Nm¯² or Pa are the units of

Answer

Modulus of Elasticity

Question 54

54. The energy band gap is maximum in

Answer

Superconductors

Answer

Insulators

Answer

Semiconductors

Question 55

55. For three dimensional deformation l.e. volume deformation the bulk modulus is given by

Question 56

56. Young’s modulus for aluminum is

Question 57

57. When the output of OR gate is 1

Answer

If either of both inputs are 1

Answer

Only if both inputs are 1

Answer

If either input is zero

Answer

If both inputs are zero

Question 58

58. Shear modulus for aluminum is

Question 59

59. Young’s modulus for bass is

Question 60

60. At absolute zero, SI acts as

Answer

None of these

Question 61

61. Shear modulus for brass is

Question 62

62. In a junction diode, the holes are due to

Answer

Extra electrons

Answer

Missing of electrons

Question 63

63. Bulk modulus for copper is

Question 64

64. Young’s modulus for diamond is

Answer 146

None of these

Answer 147

Surface tension

Answer 148

Steel is cheaper

Answer 149

Young’s modulus of steel is more than that of copper

Answer 150

Young’s modulus of copper is more than that of steel

Answer 151

Steel is less likely to be oxidized

Answer 152

A value not one of these mentioned above

Answer 153

Remains constant

Answer 154

First increases and then decreases

Answer 155

Short and thin

Answer 156

Long and thin

Answer 157

Short and tick

Answer 158

Long and thick

Answer 159

Tensile strength

Answer 160

Ductibility

Answer 161

Yield point

Answer 162

Breaking stress

Answer 163

Becomes one fourth

Answer 164

Remains unchanged

Answer 165

Bulk modulus

Answer 166

Compressibility

Answer 167

Pressure coefficient

Answer 168

Volume coefficient

Answer 169

Crystal lattice

Answer 170

All of these

Answer 171

Tensile stress

Answer 172

Shear stress

Answer 173

Compress ional stress

Answer 174

None of these

Answer 175

None of these

Answer 176

Modulus of electricity

Answer 177

Young’s modulus

Answer 178

Bulk’s modulus

Answer 179

None of these

Answer 180

Shear modulus

Answer 181

Young’s modulus

Answer 182

Bulk modulus

Answer 183

None of these

Answer 184

None of these

Answer 185

70 x 10 Nm¯²

Answer 186

91 x 10 Nm¯²

Answer 187

110 Nm¯²

Answer 188

Hidden energy states

Answer 189

Forbidden energy states

Answer 190

Band levels

Answer 191

None of these

Answer 192

Valence electrons

Answer 193

Tightly bound electrons

Answer 194

Free electrons

Answer 195

None of these

Answer 196

Semiconductor

Answer 197

None of these

Answer 198

may be p-type or n—type

Answer 199

None of these

Answer 200

Positively charged

Answer 201

Negative charged

Answer 202

None of these

Answer 203

Greater than electrons

Answer 204

Less than electrons

Answer 205

Equal to electrons

Answer 206

None of these

Total Questions:	95
Time Allowed:	35 Minutes
Total Marks:	95
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Important Physics Of Solids Question and Answer

Physics Solids Practice Test Online With Explanation

How to Score High in Physics Of Solids Online Mcqs Test?

Key Preparation Tips:

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Maan Ali

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