ECAT Physics Online Test With Answers

ECAT Physics Online Test

Sr. # Questions Answers Choice
1 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
2 A physical system under going forced vibrations is known as Simple harmonic oscillator Compound harmonic oscillator Physical harmonic oscillator driven harmonic oscillator
3 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
4 Which of the following diodes can operate in the reverse biased condition photo diode light emitting diode photo voltaic cell none of these
5 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
6 F = I(L x B) is a vector scalar unit vector none of these
7 The gavanometer constant of a moving coil galvanometer is given by K=BAN/C K=BN/CA K=NAC/B K=C/BAN
8 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>
9 The CRO is used for displaying the waveform of a given current voltage both of them none of them
10 The voltage increases linearly with time velocity acceleration torque
11 How many number of anodes used in electron gun one two three six
12 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by -4 4 2 1
13 Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in 1916 1919 1921 1923
14 The liquid which conduct current is known as heating effect chemical energy electrolyte ohm's law
15 A carnot cycle consists of One step two step three steps four steps
16 The application of Bernoulli's equation is Torricelli's theorem Venture relation Binomial theorem Both a and b
17 Bernoulli's equation is important in the field of Electrical circuit Magnetism Photoelectric effect Flow of fluids
18 Bernoulli's equation is based upon law of conservation Mass Momentum Energy None of these
19 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
20 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
21 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
22 Matter is made up of very tiny particles called Atoms Molecules Ions None of these
23 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
24 The equation of continuity
A1V1= A2V2is for the flow of
 an ideal fluid an incompressible fluid a non visconcous fluid all of the above
25 What is another name for laminar flow? streamline unsteady flow turbulent flow both (a) and (b)
26 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>
27 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
28 The flow of an ideal fluid is streamline flow incompressible flow non-viscous all of the above
29 Which of the following is a characteristic of an ideal fluid? it is non-viscous it is incompressible it's motion is steady all of the above
30 The value for systolic blood pressure for a normal healthy person is 140 torr 80 torr 90 torr 120 torr
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