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 Insulators are those materials which valence electrons are bound Loosely  Tightly Very tightly None of these
2 The conduction of electrons takes place and conduct electric current through solids is a Energy band Conduction band Valence band Completely filled band
3 The band full of electrons, which donot play any part in the conduction process is known as Conduction band Forbidden energy band Valence band Completely filled band
4 The band above the valence band is Completely filled band Conduction band Forbidden energy band None of these
5 The valence energy band may be either Completely filled Partially filled a and b All of them
6 The valence energy band can never be Filled Partially filled Empty None of these
7 The electrons occupying the outermost shell of an atom and the electrons occupying in the energy band are called Energy band Valence band Forbidden energy band None of these
8 In between two consecutive permissible energy band there is a range of energy states which cannot be occupied by electrons. These are called Energy band Energy states Forbidden energy gap None of these
9 When an atom is surrounded by large number of atoms their the energy levels are Distinct Very close Energy band None of these
10 When an atom is isolated, it energy levels are Distinct Very close Very very close None of these
11 The theory which explains the vast diversity in an electrical behaviour of all types the materials is Free electron theory Band theory Theory based as chemical properties None of these
12 Semiconductor materials have the conductivities generally lies between 10<sup>-5</sup> to 10<sup>-6</sup> (Ωm)<sup>-1</sup> 10<sup>-6</sup> to 10<sup>-4</sup> (Ωm)<sup>-1</sup> 10<sup>-7</sup> to 10<sup>-3</sup> (Ωm)<sup>-1</sup> None of these
13 The example of insulators are Copper Nickel Diamond None of these
14 The insulators have conductivities ties in the range 10<sup>-10</sup> to 10<sup>-20</sup> (Ωm)<sup>-1</sup> 10<sup>-5</sup> to 10<sup>-20</sup> (Ωm)<sup>-1</sup> 10<sup>-15</sup> to 10<sup>-25</sup> (Ωm)<sup>-1</sup> None of these
15 The conductivities of conductors (metals) have 10<sup>5</sup> (Ω)<sup>-1</sup> 10<sup>7</sup> (Ωm)<sup>-1</sup> 10<sup>8</sup> (Ωm)<sup>-1</sup> 10<sup>9</sup> (Ωm)<sup>-1</sup>
16 A steel wire 12 mm in diameter is fastened to a log and them pulled by a tractor. The length of stire between the log and tractor is 11 m. The force of 10,000 N is required to pull the log. What is stress 84.46 MPa 85.46 MPa 88.46 MPa 89.46 MPa
17 The work done by stretching force is the area of Trapezium Triangle Rectangle None of these
18 In deformation of the material, the potential energy of the molecules due to displacement from their mean positions is Lost Gained No lost no gain None of these
19 Examples of brittle substances are Glass Copper Lead None of these
20 Which of the material is brittle ? Steel Low carbon steel High carbon steel None of these
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