Physics - XII Online Test 2077/06/29
Instructions:
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1. You are going to attempt Physics online test.
2. Total time of exam is 40 Minutes.
3. Total marks is 30.
4. Once started, you need to answer all the questions before submitting the test.
5. Click on ‘Test Summary’ at last to review your answer before finishing test.
6. When you finish test, you can have result instantly. You can review your answer after finishing the test. This means you will be able to view which question are correct and which are incorrect.
7. Good luck!!!
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Question 1 of 30
1. Question
1 point(s)The sound wave produced in a gas is always
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Question 2 of 30
2. Question
1 point(s)Water waves are
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Question 3 of 30
3. Question
1 point(s)A wave y = Asin(\omega t – kx) has the pressure amplitude if density of air is \rho
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Question 4 of 30
4. Question
1 point(s)Category: PhysicsIn a travelling wave y = 0.1sin\pi(x-330t+\frac{2}{3}). The phase difference between X_1 = 3m and X_2 = 3.5m will be
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Question 5 of 30
5. Question
1 point(s)Category: PhysicsThe propagation constant of a wave is also called its
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Question 6 of 30
6. Question
1 point(s)Category: PhysicsThe velocity of sound in air is not affected by change in
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Question 7 of 30
7. Question
1 point(s)Category: PhysicsWith decrease in water vapor contents in air, velocity of sound
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Question 8 of 30
8. Question
1 point(s)Category: PhysicsThe change in temperature affect to the following parameter of sound is
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Question 9 of 30
9. Question
1 point(s)Category: PhysicsSpeed of sound in Helium is ‘U’. The speed of sound in humid helium at the same temperature will be
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Question 10 of 30
10. Question
1 point(s)Category: PhysicsThe speed of sound in Hydrogen is 11 at STP. Then in Helium is
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Question 11 of 30
11. Question
1 point(s)Category: PhysicsThe shortest length of closed pipe which resonate with a frequency ‘n’ is, if velocity of sound is V
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Question 12 of 30
12. Question
1 point(s)Category: PhysicsA closed pipe is excited to support the third overtone, it is found that air in the pipe has
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Question 13 of 30
13. Question
1 point(s)Category: PhysicsIn the third normal mode of vibration of closed organ pipe, the number of nodes and antinodes respectively are
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Question 14 of 30
14. Question
1 point(s)Category: PhysicsThe reciprocal of resistance is
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Question 15 of 30
15. Question
1 point(s)Category: PhysicsA metallic wire of resistance 40 \Omega is stretched to twice its length. Its new resistance would be approximately:
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Question 16 of 30
16. Question
1 point(s)Category: PhysicsThe current in a coil of resistance 90 ohms is to be reduced by 90 percent. What value of resistance should be connected in parallel with it?
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Question 17 of 30
17. Question
1 point(s)Category: PhysicsWhich of the following is the unit of resistance?
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Question 18 of 30
18. Question
1 point(s)Category: PhysicsWhich of the following materials is the most suitable for making a permanent magnet?
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Question 19 of 30
19. Question
1 point(s)Category: PhysicsWhat happens to the magnetic needle kept in a non-uniform magnetic field?
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Question 20 of 30
20. Question
1 point(s)Category: PhysicsWhat is the torque acting on the bar magnet of moment M which is placed in a uniform field H making an angle of 30^o with the field?
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Question 21 of 30
21. Question
1 point(s)Category: PhysicsWhich of the following statements is true about magnetic lines of force?
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Question 22 of 30
22. Question
1 point(s)Category: PhysicsMagnetic lines of force of a bar magnet do not intersect because
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Question 23 of 30
23. Question
1 point(s)Category: PhysicsWhich of the following is the significance of Millikan’s oil drop experiment?
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Question 24 of 30
24. Question
1 point(s)Category: PhysicsAn electron and a proton enters into same electric field perpendicular to the direction of field. Which one get more deflection due to field?
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Question 25 of 30
25. Question
1 point(s)Category: PhysicsAn electron having energy 800 eV moves at right angles to the uniform magnetic field of 2.6\times 10^{-3} T. What is the radius of path followed by electron?
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Question 26 of 30
26. Question
1 point(s)Category: PhysicsA beam of electrons moving with velocity of 5\times 10^6 m/s passes between two parallel plates 1cm apart. A magnetic field of 0.05T is applied to keep electrons undeflected. What is the p.d. between plates?
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Question 27 of 30
27. Question
1 point(s)Category: PhysicsAn electron moving with a speed of 2.5\times 10^7 m/s is deflected by an electric field of 1600V/m perpendicular to its path. If the radius of the electron trajectory is 2.3m, calculate e/m for the electron.
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Question 28 of 30
28. Question
1 point(s)Category: PhysicsWhen the beam of electrons is passed between the pates having an electric field, the beam deflects towards
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Question 29 of 30
29. Question
1 point(s)Category: PhysicsIf the speed of sound at 0^oC is v_o, the velocity at 273^oC will be
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Question 30 of 30
30. Question
1 point(s)Category: PhysicsThe Laplace correction was necessary to Newton’s calculation of velocity of sound, because propagation of sound in a medium is
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