The ratio of the amplitude of the magnetic field to the amplitude of the electric field for electromagnetic wave propagation in a vacuum is equal to

  1. Home

Question:
The ratio of the amplitude of the magnetic field to the amplitude of the electric field for electromagnetic wave propagation in a vacuum is equal to

1.Unity

2.Speed of light in vacuum

3.Reciprocal of the speed of light in vacuum

4.The ratio of magnetic permeability to electrical susceptibility in a vacuum.

Posted Date:-2021-12-08 18:21:34

More MCQS Questions and answers

  1. A boy in the topmost birth in a compartment of a train drops an apple aiming at the open hands of his birth while the train is just going to stop at the railway station. Where will the apple fall if the brother is sitting vertically below his hands at a distance of 2 meters?
  2. At what angle should the two force vectors 5N and 12 N be added to get a resultant vector of 13 N?
  3. If a coil carrying current is placed in a uniform magnetic field, then
  4. If the magnitude of the resultant force of two forces is lesser than the magnitude of the larger force, then
  5. What is the torque acting on the bar magnet of moment M which is placed in a uniform field H making an angle of 300 with the field?
  6. What is the voltage applied across the resonant circuit if the ac voltage across resistance R, inductance L and capacitance C is 5 V, 10 V and 10 V respectively?
  7. What is the work done by the magnet of moment M if it is rotated through 3600 in magnetic field H?
  8. Which surface is considered for Gauss law?
  9. Why does a man getting off a moving bus fall down?
  10. Why does a rider on horseback fall when the horse starts running all of a sudden?
  11. A bird weighing 2 kg is locked inside a cage of mass 1 kg. If the bird starts flying what will be the weight of the bird and cage assembly?
  12. A coil of diameter 0.2 cm is formed by a 6.28 m long wire and a current of 1 amp is passed in it. The magnetic induction at its centre will be
  13. A force F acts between two charges +Q and -Q that is placed at a certain distance from each other. The third sphere of charge Q is placed between them. What is the magnitude and force experienced by the third charge?
  14. A long magnet is cut into two parts such that the ratio of their lengths is 2:1. What is the ratio pole strength of both the section?
  15. A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns will be
  16. A person travels 10 km North and 20 km East. What will be the displacement from the initial point?
  17. At a distance r, two equal charges are kept and they exert a force F on each other. What is the force acting on each charge, if the distance between them is doubled and charges are halved?
  18. Determine the total electric flux of a unit positive charge which is kept in the air?
  19. Electromagnetic waves are produced by
  20. For which of the following is magnetic susceptibility negative?
  21. If the sum of two unit vectors is 1, then what is the difference between them?
  22. In an electromagnetic wave in free space, the root mean square value of the electric field is 6 V/m. The peak value of the magnetic field is
  23. In electromagnetic waves the phase difference between electric field vector and magnetic field vector is
  24. In the above question what will happen if the string C is stretched slowly?
  25. Magnetic lines of force of a bar magnet do not intersect because
  26. Pick the correct statement from the following
  27. Pick the true statements about electric field lines
  28. The magnetic field at a point x on the axis of a mall bar magnet is equal to the field at a point y on the equator of the same magnet. The ratio of the distances of x and y from the centre of the magnet is
  29. The magnetism of a magnet is due to
  30. The ratio of the amplitude of the magnetic field to the amplitude of the electric field for electromagnetic wave propagation in a vacuum is equal to
  31. The velocity of electromagnetic radiation in a medium of permittivity ε0 and permeability μ0 is given by
  32. To which part of the spectrum does EM waves belong if the energy of the wave is of the order of 15 KeV.
  33. What happens to the magnetic moment if a hole is made at the centre of a bar magnet?
  34. What is the frequency of a 5μF capacitor that has a reactance of 1000 Ω?
  35. What is the net force on the particle if it is simultaneously acted upon by two forces 4 N and 3 N?
  36. What is the reciprocal of impedance?
  37. What is the SI unit of permittivity of free space?
  38. What is the time taken by the alternating current of 50 Hz with an r.m.s value of 10 ampere to reach from zero to a maximum value and the peak value of current?
  39. What will happen if a force is applied to a body moving with a constant speed along a straight line?
  40. When is Gauss law true?
  41. Which of the following can be used to produce a propagating electromagnetic wave?
  42. Which of the following materials is the most suitable for making a permanent magnet?
  43. Which of the following rays are not electromagnetic waves?
  44. Which of the following statements is true about inertia?
  45. Which of the following statements is true about magnetic field intensity?
  46. Which of the following statements is true about magnetic lines of force?
  47. Which properties amount the following is false about electromagnetic waves?
  48. Why can’t the DC ammeter measure an alternating current?
  49. Why do passengers in a moving train suddenly feel a jerk in the forward direction when the train stops abruptly?
Search
Olete Team
Online Exam Test Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on Online Exam Test website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!