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 In a semiconductor,the mobility of holes is Greater then electrons Less than electrons Equal to electrons None
2 N-type crystal is Neutral Positively charged Negative charged None of these
3 The critical temperature for mercury is 1.18 K 4.2 K 3.72 K 7.2 K
4 Arsenic antimony or phosphorus are impurities of p-type n-type May be p-type or n-type None of these
5 In n-type substances the minority carriers are Holes Electrons Neutrons None
6 A substance which have empty conduction band is called Conductor Insulator Semiconductor None of these
7 The electrons in the outermost shell of an atom are called Valence electrons Tightly bound electrons Free electrons None of these
8 Young's modulus for copper is 70 x 10 Nm<sup>-2</sup> 91 x 10 Nm<sup>-2</sup> 110 Nm<sup>-2</sup> None of these
9 The units of modulus of elasticity are same as that of Stress Strain Force None
10 The ratio of applied stress to volumetric strain is called shear modulus Young's modulus Bulk modulus None of these
11 The measure of deformation of a solid when stress is applied to it is called Strain Stress Force None of these
12 When a strength changes the length of a body,it is called Tensile stress Shear stress Compressional stress
13 The whole structure obtained by the repetition of unit cell is known as Unit cell Crystal lattice Ore All of these
14 Polythene,polystyrene and nylon are example of Polymeric solids Crystalline solids Glassy solids
15 The fractional change in volume per unit increase in pressure is called: Bulk modulus Compressibility Pressure coefficient Volume coefficient
16 If both the length and radius of the wire are doubled,how does the modulus of elasticity change? Becomes one fourth Halved Doubled Remains unchanged
17 Breaking load for units area of cross-section of a wire is called: Tensile strength Ductibility Yield point Breaking stress
18 A cable breaks if stretched by more than 2 mm.It is cut into two equal parts.How much either part can be stretched without breaking? 0.25 m 0.5 m 1 mm 2 mm
19 For obtaining appreciable extension,the wire should be: Short and thin Long and thin Short and tick Long and thick
20 According to the Hooke's law the force required to change the length of a wire by '1' is proportional to: 1<sup>-2</sup> 1<sup>-1</sup> 1
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