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 the doping process, the ratio of the doping atoms to the semi-conductor atom is 1 to 10 1 to 10<sup>3</sup> 1 to 10<sup>6</sup> 1 to 10<sup>9</sup>
2 When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as impurification adding doping extrinsivity
3 A semi conductor in its extremely pure from is known as extrinsic semi-conductor intrinsic semi-conductor either of them none of them
4 Conductors are those materials in which energy gap is very large (several eV) very narrow (= 1eV) either of them none of them
5 Insulators are those material in which energy gap is very large (several eV) very narrow (= 1ev) either of them none of them
6 The materials in which there are plenty of free electrons for electrical conduction are known as conductors insulators semi-conductors all of them
7 The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as conductors insulators semi-conductors all of them
8 The bands below the valence band are completely filled and play active part in conduction process completely filled and plays no part in conduction process not completely filled and play active part in conduction process not completely filled and play no part in conduction process
9 The conduction band in a solid may be empty cannot be empty should be filled all of them
10 The electrons occupying the conduction band are known as conduction electrons free electrons both of them none of them
11 The band above the valence band is called high energy band conduction band empty band none of them
12 The valence band of an atom in a solid is always empty may or may not be empty can never be empty none of them
13 When a large number of atoms are brought close to one another to form a solid, each energy level of an isolated atom splits into sub-levels, called energy bands energy shells states all of them
14 Electrons of an isolated atom are bound to the nucleus, and? can only have distinct energy level can only have same energy level may or may not have distinct energy none of them
15 Which of the following theory completely explain the three types of materials? Bohr model of electron distribution Rutherford atomic model Pauli's exclusion principle energy band theory
16 The electrical conductivities of insulators are ranging from 10<sup>-5</sup>to 10<sup>-10 </sup>(<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);"><b>Ω m)</b><sup>-1</sup></span> 10<sup>-10</sup>to 10<sup>-15</sup>(<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 224);"><b>Ω m)</b><sup>-1</sup></span> 10<sup>-5</sup>to 10<sup>-15</sup>(<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 224);"><b>Ω m)</b><sup>-1</sup></span> 10<sup>-10</sup>to 10<sup>-20</sup>(<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 224);"><b>Ω m)</b><sup>-1</sup></span>
17 Metals are good conductors of electricity and their conductivities are of the order of 10<sup>3</sup>(<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);"><b>Ω m)<sup>-1</sup></b></span> 10<sup>4</sup>(<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 224);"><b>Ω m)<sup>-1</sup></b></span> 10<sup>6</sup>(<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 224);"><b>Ω m)<sup>-1</sup></b></span> 10<sup>7</sup>(<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 224);"><b>Ω m)<sup>-1</sup></b></span>
18 Lead, copper and wrought iron are examples of brittle substances ductile substances plastic substances elastic substances
19 Glass and high carbon steel are the examples of brittle substances ductile substances plastic substances elastic substances
20 The substances which break just after the elastic limit is reached, are known as brittle substances ductile substances plastic substances elastic substances
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