Showing posts with label Physics Paper II. Show all posts
Showing posts with label Physics Paper II. Show all posts

4/16/2015

Important Questions in Physics Paper II for NET Exams

4/16/2015 0
Important Questions in Physics Paper II for NET Exams

Important Questions in Physics Paper-II for NET Exams



1.Consider Kirthika has a hammer weighing 3 kg. If its velocity = 10 m/s, strikes against the head of a spike and drives it into a block of wood. Gradually the hammer comes to rest in 0.025 s. Now, what should be the impulse of the ball?


  1. 20Ns

  2. 30Ns

  3. 12Ns

  4. 11Ns


2.Which of the following has boundary layer


  1. flow of real fluids

  2. flow of ideal fluids

  3. both of the above

  4. none of the above


3.What is a large Reynold number indication?


  1. It is an indication of laminar flow of the fluid

  2. It is an indication of steady flow of the fluid

  3. It is an indication of highly turbulent flow of the fluid 

  4. both 1 & 2


4. Among which one of the following had proposed the first law of thermodynamics as a special case?


  1. Newton's law

  2. Joule's Law

  3. Green's Law

  4. Charle's Law


5.Which one of the following is the supporting statement for- " The temperature of a gas is the measure of"


  1. average distance between gas molecules

  2. average kinetic energy between the gas molecules 

  3. average potential energy between the gas molecules 

  4. average momentum between the gas molecules


6.In a turbulant flow the shear stress is caused by


  1. density of the fluid

  2. volume of the fluid

  3. eddy viscosity of the fluid

  4. dynamic adhesive force between the fluid molecules


7.What does the diesel cycle consist of?




  1. 2 isothermal+1 constant pressure+ 1 constant volume pressure

  2. 2 adiabatic +2 constant volume pressure

  3. 2 adiabatic +1 constant pressure+ 1 constant volume pressure

  4. 2 isothermal+ 2 constant pressure


8.Which among the given below option is related to Newton's well known phrase - ‘quantity of motion’?


  1. momentum

  2. force

  3. acceleration due to gravity

  4. all of the above


9.Which one of the following is the correct reason for the absence of atmosphere on the moon? 


  1. Because the escape velocity of gas molecules is less than their root mean square velocity.

  2. Because it is closer to the earth

  3. Because it revolves round the earth

  4. both 2 & 3


10.Consider that you have two objects well named as A and B. Where A has a mass of 6 kg and B has a mass of 34 kg respectively. Then


  1.  A has more inertia than B

  2.  B has more inertia than A

  3.  both 1 & 2

  4.  none of the above 




ANSWER KEY



Answer(1) : 2

Answer(2) : 1

Answer(3) : 3

Answer(4) : 4

Answer(5) : 1

Answer(6) : 3

Answer(7) : 3

Answer(8) : 1

Answer(9) : 1

Answer(10) : 2

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4/15/2015

Important Questions in Physics Paper- II for NET Exam

4/15/2015 0
Important Questions in Physics Paper- II for NET Exam

1. Which one of the following engine has the maximum Carnot cycle  


  1.  Steam engine

  2.  well lubricated engine

  3.  reversible engine 

  4. irreversible engine


2. The type of polarization where the displacement of cations and axions in opposite direction by the influence of external electric field occurs is


  1. electronic  polarization

  2. ionic  polarization

  3. space charge  polarization

  4. none of the above



3. what should be the coefficient of discharge of an orifice-meter than that of a  venturimeter



  1. much small than

  2. extremely higher than

  3. equal to

  4. both (2) & (3)




4. The second law of thermodynamics supports



  1. heat can not be transferred from  low temperature to high temperature source without the help of external energy

  2. heat can not be transferred from  low temperature to high temperature source if COP of process is more than unity

  3. heat can not be transferred from  low temperature to high temperature source by using refrigeration cycle

  4. heat can not be transferred from  low temperature to high temperature source by constant temperature cycle


 5. Select the best suited definition of transfer function from the given below options






  1. its a ratio of the laplace transform of the system response to the  laplace transform of the system input function

  2. its a ratio of the laplace transform of the system response to the  laplace transform of the system output function

  3. its  laplace transform of the system response plus laplace transform of the system input function

  4. its laplace transform of the system response minus laplace transform of the system input function




6.Which one of the following property is possessed by a real practical fluid



  1. viscosity

  2. compressibility

  3. weight density

  4. specific volume




7. Among which of the following  the correct definition of displacement thickness stands


  1. the layer which represent the entropy

  2. the layer which represent  reduction in momentum

  3. the distance measured perpendicular to the boundary by which the free stream is displaced in order to have a formation of boundary layer

  4. the distance measured perpendicular to the boundary by which the free stream is displaced in order to prevent the  formation of boundary layer


8. Venturimeter is used to measure



  1. flow rate

  2. pressure

  3. viscosity

  4. none of the above




9.Let us consider that the radius of the earth were to shrink by 1%. But the mass remaining will remain same and the acceleration due to gravity on the earth’s surface would


  1. decrease by 11.65%

  2. remain unchanged

  3. increase by 2%

  4. will increase by 12.8%


10.The first observer on super conductivity was 



  1. H S Onnnes

  2. H K Onnes

  3. Kirchoff

  4. Tolman








Answer (1) : 3


Answer (2) : 2


Answer (3) : 1


Answer (4) : 3  


Answer (5) : 1


Answer (6) : 2


Answer (7) : 3 


Answer (8) : 1


Answer (9) : 3


Answer (10) : 2







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4/10/2015

Important Questions in Physics Paper-II & Paper-III for NET Exam

4/10/2015 0
Important Questions in Physics Paper-II & Paper-III for NET Exam

1. If we completely remove air from an electric bulb, it will prevent


  1. bursting of the bulb

  2. loss of light

  3. oxidation of tungsten

  4. electric shock


Answer:  (3)





2. Why does the filament of an electric bulb lamp becomes white hot but the lead - in wires holding the filament are slightly heated:



  1. Because  it is made up of black iron

  2. Because of its low  resistance

  3. Because of its high melting point

  4. None of the above 


Answer:  (2)







3. Radioactivity is implemented in the field of




  1. agriculture

  2. industry

  3. all of the above

  4. none of the above



Answer:  (3)






4. Heavy nucleus can be split into roughly two equal fragments with the emission of energy by the process of



  1. Fission 

  2. Fusion

  3. Transmutation

  4. Photoelectric Effect



Answer:  (1)






5. Radiocarbon dating technique is used 



  1. to estimate formation of rocks

  2. to estimate the age of soil

  3. to estimate the age of fossils

  4. both (1) & (2)



Answer:  (3)






6.When we make a fuse wire, the selected material should have



  1. low  melting point

  2. high melting point

  3. high resistivity

  4. low resistivity



Answer:  (1)






7. Soundness of cement is usually the measure of



  1. its strength

  2. its durability

  3. its volume change on setting

  4. its permeability




Answer:  (3)




8. Which one of the following is the velocity ratio of a first system of pulleys with four pulleys



  1. 20

  2. 5

  3. 9

  4. 16



Answer:  (4)






9. What will be the new the eddy current  loss, if the old eddy current loss in a transformer is 100W  with f=60 Hz and the thickness t of laminations = 0.4 mm with f=50Hz and t=0.2mm



  1. 20.12W

  2. 14.2W

  3. 17.36W

  4. 18.36W



Answer:  (3)






10. Which one is the best example of semiconductor



  1.  copper

  2. silver

  3.  mica

  4.  germanium




Answer:  (4)


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