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 The modulus of elasticity of material does not depend upon Shape Temperature Nature of material Impurities mixed
2 Longitudinal strain can be produced in Glass Water Honey Hydrogen gas
3 If the tensile force is suddenly removed from a wire then its temperature will Decrease Increase Become zero Remain constant
4 The Hook's law defines Modulus of elasticity Stress Strain Elastic limit
5 The shearing strain is measured by Angle of rotation Shearing stress Angle of shear Modulus of rigidity
6 If S is the stress and Y is Young's modulus of the material of a wire, the energy stored in the wire per unit volume is 2 S<sup>2</sup>Y S<sup>2</sup>/2Y 2Y/S<sup>2</sup> S/2Y
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8 On applying a stress of 20 x 108Nm-2, the length of perfectly elastic wire is doubled. Its young' modulus is 40 x 10<sup>8 </sup>N/m<sup>2</sup> 20 x 10<sup>8</sup>N/m<sup>2</sup> 10 x 10<sup>8</sup>N/m<sup>2</sup> 5 x 10<sup>8</sup>N/m<sup>2</sup>
9 A certain force F increases the length of a wire by 1 mm. The force required to increase its length by 2mm is 2 F 4 F 8 F 16 F
10 A bar of length L, cross-section A and Young's modulus Y, is pulled by a force F from both ends so as to produce an elongation x. Then: x<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>∝</i></span>1/L x<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>∝</i></span>A x<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>∝</i></span>1/A x<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>∝</i></span>Y
11 The young's modulus of a wire of length L and radius 'r' is Y. If the length is reduced to L/2 and radius to r/2, its Young's modulus will be Y/2 Y 2Y 4Y
12 Energy per unit volume of a stretched wire is (1/2) x load x extension Load x stress Stress x strain (1/2) x stress x strain
13 The modulus of rigidity of a liquid is: Zero 1 Infinite None of these
14 The fractional change in volume per unit increase is pressure in called: Pressure coefficient Volume coefficient Bulk modulus Compressibitlity
15 A wire can support a load W without breaking. It is cut into two equal parts. The maximum load that each part can support is: W/4 W/2 W 2 W
16 The results of mechanical tests are usually represents in terms of: Stress Strain Both A &amp; B None of these
17 The reciprocal of bulk modulus is called: Shear modulus Elasticity Young's modulus Compressibility
18 The atom or molecules in crystalline solids are held together by: Cohesive force Adhesive force Gravitational force Magnetic forces
19 The smallest part of a crystal lattice is called: A molecule An atom A unit cell A particle
20 Molecules of a solid possess: Translation motion Vibration motion Rotation motion Linear motion
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