MDCAT Physics Chapter 13 Deformation of Solids MCQ's Test With Answers

MDCAT Physics Chapter 13 Deformation of Solids MCQ's Test

Sr. # Questions Answers Choice
1 A wire is stretched to double of its length.The strain is 2 1 Zero 0.5
2 How does the Young's modulus vary with the increase of temperature? Decrease Increase Remains constant First increases and then decreases
3 The modulus of elasticity of a liquid is: Zero 1 Infinity A value not one of those mentioned above
4 Steel is preferred for making springs over copper.Whey? Steel is cheaper Young;s modulus of steel is more than that of copper Young's modulus of copper is more than that of steel Steel is less likely to be oxidized.
5 Which of the modulus of elasticity is involved in compressing a rod to decrease its length? Young's modulus Bulk modulus Modulus of rigidity None of the above
6 The dimensional formula for the modulus of elasticity is same as that for: Stress Strain Velocity Surface tension
7 Stress beyond which a permanent deformation is observed in a body is called Minimum stress Maximum Yield stress Plastic stress
8 Substance which break just after the elastic limit is crossed are called Soft subtances Hard substances Brittle substances Ductile substances
9 If stress is increased beyond the elastic limit a permanent change in the material is observed This behavior is called Elastic deformation Elasticity Plasticity  Yield strength
10 Stress that induces a change in the shape of the body is named as Tensile stress Volumetric stress Shear stress None of these
11 Upon applying some unbalanced external stress the deformation may be observed in Length Surface area Volume All of these
12 The atoms or molecules in a crystalline solid are held together by Attractive force Gravitational force Cohesive force Electromagnetic force
13 The limit below which the Hooke s law holds well is called Yield point Breaking stress Tensile strength Elastic limit
14 Steel is more elastic than rubber because It is a metal Its density is higher Ratio of stress to strain is more Ratio of stress to strain is less
15 Yttrium barium copper oxide (Yba2Cu3O7) becomes superconductor at 163 K -100 °C both and b None of these
16 Which of the given elements is a diamagnetic material Antimony Bismuth Copper All of these
17 1st superconductor was discovered in year 1890 1930 1895 1911
18 To get p-type semiconductor we add impurity from 3<sup>rd</sup> group 4<sup>th</sup> group 5<sup>th</sup> group 6<sup>th</sup> group
19 If stress is increased beyond the elastic limit and change in solid is permanent this behaviour is called Elasticity Plasticity Conductivity Insulator
20 Reciprocal of bulk modulus is called Shear modulus Compressibility Young s modulus None
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