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 ratio of stress/strain is called as Modulus of elasticity Bulk modulus Shear modulus Young's modulus
2 The ratio of linear stress/linear strain is called as Young's modulus Bulk modulus Shear modulus Modulus
3 The strain is the ratio of Stress/strain Strain/stress Force area change in length/original length
4 The deformation measured in terms of some twisting angle due to action of stress is known as Stress Linear stress Compressive stress Shear stress
5 The stress which increase the length in one dimension only is called length stress only have compressive stress Have both tensile and compression stress None of them
6 A solid subjected to deformation along one dimension Only have tensile stress Only have compressive stress Have both tensile and compressive stress None of them
7 The measure of deformation in a certain solid due to the action of stress is called Hooke's law Mechanical advantage Stress Strain
8 The ability of anybody to return, to its original shape is called Elasticity Elastic force Stress Strain
9 A wire of 100 mm length and 1 mm2surface area stretches 10 mm under a load of 60 N. A second wire of same material, with half the diameter of the first wire is stretched by the same load. What is the extension in the second wire? 20 mm 30 mm 40 mm 50 mm
10 The young modulus of steel is greater than that of aluminium.
Keeping the statement above in mind state which of the following is true
 Steel requires a larger stress on it for a given strain than does aluminium Aluminium requires more force than steel does to get a similar extension as steel Steel requires less force than aluminium does to get a similar extension as aluminium Steel requires a larger strain on it for a given stress than does aluminium
11 The high-tensile steel used to support the roadway of a suspension bridge breaks under a stress of 2 x 109Pa. Find the minimum cross-sectional area for a cable if it is to support a load of mass 2 x 105kg.
(g = 10 N kg-1)
 10<sup>-2</sup>m<sup>2</sup> 10<sup>-1</sup>m<sup>2</sup> 10<sup>-4</sup>m<sup>2</sup> 10<sup>-3</sup>m<sup>2</sup>
12 Which of the following pair of quantities do not have the same units? Stress, Young's modulus Strain, bulk modulus Stress, bulk modulus None of them
13 A rubber cord 100 cm long is elongated 1 cm by a stretching force of 0.2 N. The cross-sectional area of the cord is 0.04 cm2. Find the Young's modulus for that rubber. 0.5 N cm<sup>-2</sup> 0.05 N cm<sup>-2</sup> 50 N cm<sup>-2</sup> 500 N cm<sup>-2</sup>
14 Which of the following pair of quantities have the same units? stress, Young's modulus Young's modulus, bulk modulus Stress, bulk modulus All of them
15 220 cm3of water, when subjected to a stress of 100 atmosphere, becomes 219 cm3. Find the bulk modulus of water 100 N m<sup>-3</sup> 100 N m<sup>-2</sup> 22000 N m<sup>-3</sup> 22000 N m<sup>-2</sup>
16 What is the bulk modulus of a material? strain/volumetric strain volumetric stress/strain stress/volumetric strain volumetric stress/volumetric strain
17 What is the Young modulus of a meta? Extension/force Force/extension Strain/stress Stress/strain
18 What is the unit of the Young's modulus? N m<sup>-2</sup> N m<sup>-1</sup> N m N m<sup>2</sup>
19 The cores of electromagnets used for alternating currents where the specimen repeatedly undergoes magnetization and demagnetization should have broad hysteresis curves narrow hysteresis curves any one of the them none of them
20 To make a permanent magnet, a material should have hihg retentivety and small coercive force low retentivety and high coercive force low retentivety and small coercive force high retentivety and high coercive force
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