Physics ECAT Pre Engineering MCQ's Test For Full Book With Answers

Physics ECAT Pre Engineering MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 The curve representing an isothermal process is called adiabat isotherm fixed temperature none of them
2 In case of an ideal gas, the P.E associated with its molecule is maximum zero minimum not fixed
3 In which process the condition for the application of Boyle's law on the gas is fulfilled isochoric process adiabatic process isothermal process none of them
4 The process which is carried out at constant temperature is known as adiabatic process isothermal process isochoric process none of them
5 If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy 0 J 2 J 5 J 10 J
6 The bicycle pump provides a good example of first law of thermodynamics second law of thermodynamics third law of thermodynamics none of them
7 A diatomic gas molecule has translational energy rotaional energy vibrational energy all of them
8 We can express the work in term of directly measurable variables indirectly measurable variables either of them both of them
9 If an amount of heat enters the system it could decrease the internal energy not change the internal energy increase the internal energy none of them
10 The work done on the system by the environment is considered as positive negative zero any one of them
11 The work done by the system on its environment is considered as positive negative zero any one of them
12 The internal energy of a system does not depend upon the initial state of the system final state of the system path none of them
13 In thermodynamics, internal energy is the function of temperature pressure state none of them
14 When two objects are rubbed together, their internal energy remains same decreases remains the same then decreases increases
15 The internal energy of an ideal gas system is generally the translational K.E of molecules vibrational K.E of molecules rotational K.E of molecules all of them
16 In the study of thermodynamics, which gas is considered as the working substance real gas ideal gas any gas may be ideal or real none of them
17 Internal energy is the sum of all the forms of K.E P.E both of them none of them
18 The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to 300<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 573<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 600<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 743<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
19 The absolute temperature for an ideal gas is directly proportional to the rotational K.E of gas molecules directly proportional to the vibrational K.E of gas molecules directly proportional to the average translational K.E.of gas molecules directly proportional to the P.E. of gas molecules
20 The Boltzman constant has the value 1.38 x 10<sup>-23</sup>JK<sup>-1</sup> 1.28 x 10<sup>-23</sup>JK<sup>-1</sup> 1.38 x 10<sup>-26</sup>JK<sup>-1</sup> 1.28 x 10<sup>-26</sup>JK<sup>-1</sup>
21 The ideal gas law is P = nRT V = nRT PV =RT PV =nRT
22 The pressure exerted by the gas is directly proportional to the P.E inversely proportional to the P.E inversely proportional to the K.E directly proportional to the K.E
23 While deriving the equation for pressure of a gas we consider the rotational motion of molecules vibrational motion of molecules linear motion of molecules all of them
24 The pressure of gas everywhere inside the vessel will be the same provided the gas is of Non-uniform density uniform density high density low density
25 If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is P=P/V&lt;1/2mv<sup>2</sup>&gt; P=2N/V&lt;1/2mv<sup>2</sup>&gt; P=2/3N/V&lt;1/2mv<sup>2</sup>&gt; P=2/3N/V&lt;mv<sup>2</sup>&gt;
26 Which of the following is not an assumption of kinetic energy a finite volume of gas consists of very large number of molecules the gas molecules are in random motion collision between the gas molecules are inelastic the size of the gas molecules is much smaller than the separation between molecules
27 The behaviour of gases is well accounted by the kinetic theory based on microscopic approach macroscopic approach both of them none of them
28 A semi-conductor in its extremely pure form is known as extrinsic semi-conductor intrinsic semi-conductor either of them none of them
29 The materials in which there are plenty of free electrons for electrical conduction are known as conductors insulators semi-conductors all of them
30 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
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