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 In a resonance situation the amplitude of the motion may become extra ordinarily large, if the driving force is large the driving force is zero the driving force may be feeble all of them
2 If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get diffraction beat interference resonance
3 Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as waves beat interference resonance
4 The vibrations of factory floor caused by the running of heavy machinery is an example of free vibration natural vibrations forced vibrations all of them
5 A physical system under going forced vibrations is known as Simple harmonic oscillator Compound harmonic oscillator Physical harmonic oscillator driven harmonic oscillator
6 In a transistor, if the central region is p-type then this type of transistor is known as p-n-p transistor n-p-n transistor either of these none of these
7 Which of the following diodes can operate in the reverse biased condition photo diode light emitting diode photo voltaic cell none of these
8 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit photo diode light emitting diode photo voltaic cell none of these
9 F = I(L x B) is a vector scalar unit vector none of these
10 The gavanometer constant of a moving coil galvanometer is given by K=BAN/C K=BN/CA K=NAC/B K=C/BAN
11 When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is 90<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 75<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 0<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 180<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
12 The CRO is used for displaying the waveform of a given current voltage both of them none of them
13 The voltage increases linearly with time velocity acceleration torque
14 How many number of anodes used in electron gun one two three six
15 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by -4 4 2 1
16 Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in 1916 1919 1921 1923
17 The liquid which conduct current is known as heating effect chemical energy electrolyte ohm's law
18 A carnot cycle consists of One step two step three steps four steps
19 The application of Bernoulli's equation is Torricelli's theorem Venture relation Binomial theorem Both a and b
20 Bernoulli's equation is important in the field of Electrical circuit Magnetism Photoelectric effect Flow of fluids
21 Bernoulli's equation is based upon law of conservation Mass Momentum Energy None of these
22 With increase of temperature, the viscosity of liquid and gases Increases for both Decreases for both Increases for liquids and decreases for gases Decreases for liquids and increases for gases
23 The velocity of falling raindrop attains limited value because of Up trust of air Viscous force exerted by air Surface tension effect Air currents atmosphere
24 The SI unit of viscosity is kg m<sup>-1</sup>s<sup>-1</sup> kg ms<sup>-1</sup> kg m<sup>-1</sup>s<sup>-2</sup> kg m<sup>-1</sup>s
25 Matter is made up of very tiny particles called Atoms Molecules Ions None of these
26 A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is 125 J 90 J 160 J 85 J
27 The equation of continuity
A1V1= A2V2is for the flow of
 an ideal fluid an incompressible fluid a non visconcous fluid all of the above
28 What is another name for laminar flow? streamline unsteady flow turbulent flow both (a) and (b)
29 Blood pressure is measured in torr. Which of the following units could belong to torr? N m<sup>-1</sup> N m<sup>-2</sup> N m N<sup>-1</sup>m<sup>-2</sup>
30 Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid? potential energy pressure energy strain energy (a) and (b) only
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