MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 Substances which undergo plastic deformation until they break, are known as brittle substances ductile substances plastic substances neither of them
2 The maximum stress that a material can withstand is known as plastic point elastic point yield point ultimate tensile strength
3 When the deformation produced in the material becomes permanent, this type of behaviour is called proportionality elasticity plasticity none of them
4 Under the elastic region, the deformation produced in the material is permanent temporary either of them none of them
5 In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as plastic limit plastic deformation proportional limit elastic behaviour
6 The number of different crystals systems based on the geometrical arrangement of their atoms and the resultant geometrical structures are 5 7 9 14
7 When the shear stress and shear strain are involved, then their ratio is called Young's modulus Bulk modulus Shear modulus all of them
8 In case of linear deformation, the ratio of the tensile stress to the tensile strain is called Young's modulus Bulk modulus shear modulus all of them
9 In case of the three dimensional deformation, when volume is involved, the ratio of applied stress to volumetric stain is called Young's modulus Bulk modulus shear modulus all of them
10 The ratio of shearing stress/shearing strain is called as modulus Pascal modulus Hooke's modulus shear modulus
11 The ratio of volume stress/volume strain is called as modulus Bulk modulus shear modulus Young's modulus
12 The ratio of linear stress/linear strain is called Yong's modulus Bulk modulus shear modulus modulus
13 The modulus of elasticity can be written as stress x strain strain/stress 1/2 x stress x strain stress/strain
14 Experiments revealed that the ratio of the stress to the strain is a constant value for different material all material a given material all of them
15 The SI unit of strain is N dynes pascal dimensionless
16 The measure of the deformation in a solid when stress in applied to it is called elastic constant Young's modulus strain elasticity
17 When a stress changes the shape, it is called the compressional stress tensile stress shear stress any one of them
18 When a stress changes the volume, it is called the compressional stress tensile stress shear stress any one of them
19 When a stress changes length, it is called the compressional stress tensile stress shear stress any one of them
20 The SI unit of stress is Nm<sup>2</sup> Nm dynesm<sup>-1</sup> N
21 The force applied on unit area to produce any change in the shape, volume or length of a body is known as strain elasticity stretching stress
22 The results of mechanical tests are usually expressed in terms of stress strain stress and strain neither stress nor strain
23 The ability of the body to return to its original shape is called deformation stretching compressing elasticity
24 The crystalline structure of NaCl is rectangular hexagonal tetrahedral cubical
25 The smallest three dimensional basic structure in a crystalline solid is called lattice point crystal lattice cubic crystal unit cell
26 polymeric solids have low specific gravity high specific gravity either of them none of them
27 Synthetic materials fall into the category of crystalline solids amorphous polymeric solids all of them
28 On heating, glass gradually softens into a paste-like state before it becomes a very viscous liquid at almost 600<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 7600<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 800<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 900<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
29 Glass is an example of crystalline solid amorphous solid polymeric solid none of them
30 Amorphous solids are more like crystalline solids polymeric solids glassy solids any one of them
31 Every crystalline solid has definite melting point different melting points may or may not be definite none of them
32 The cohesive forces between atoms, molecules or ions in crystalline solids maintain short range order long range order both of them none of them
33 In metallic crystals which of the following thing remains constant? amplitude of oscillations temperature of solid average atomic positions all of them
34 The amplitude of oscillation of each atom in a metallic crystal rises with the rise in temperature decrease in temperature even temperature remains constant all of them
35 The molecules or ions in a crystalline solid are static not static randomly moving all of them
36 The solids which have structure in between order and disorder are called amorphous solids polymeric solids crystalline solids all of them
37 There is a regular arrangement of molecules in amorphous solids polymeric solids crystalline solids none of these
38 The disadvantage of the step-index fibre can be reduced by graded index fibre non-graded index fibre both of these none of these
39 In Multimode step index fibre the refractive index from its centre to the boundary is 1 1.55 1.52 1.43
40 Multimode step index fibre is useful for short distance long distance both a and b none of them
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