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  1. Which of the following electric quantities is vector in character?
  2. Hysteresis loss can be reduced by one of the following.
  3. Defined as the ratio of the volume occupied by the atoms or ions in a unit cell divided by the volume…
  4. If on looking at any one end of a solenoid; the direction of current flow is found to be clockwise then…
  5. What is the cgs unit of magnetomotive force?
  6. One oersted (Oe) is equivalent to _____ Gb/cm.
  7. One weber of flux is equal to _______ magnetic lines of force.
  8. The simplest type of atom to exist is the ______ atom.
  9. What is the SI unit of specific resistance or resistivity?
  10. The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force…
  11. If the magnetic material is located within a coil through which alternating current (60 Hz frequency)…
  12. What bond is formed when one or more electrons in the outermost energy orbit of an atom are transferred…
  13. The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?
  14. A magnetic field is
  15. The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…
  16. Who discovered superconductivity in 1911?
  17. The emf produced in a wire by its motion across a magnetic field does not depend upon the
  18. The temperature coefficient of resistance of semiconductors is
  19. A good conductor has how many valence electrons?
  20. The straight line passing through the two poles of magnet is called
  21. Core materials of a good relay have _________ hysteresis loop.
  22. The evaporation of electrons from a heated surface is called
  23. Which of the following is a vector quantity?
  24. The magnetic potential in a magnetic circuit can be measured in terms of
  25. The greater percentage of materials is _________.
  26. The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization…
  27. Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
  28. If the number of valence electrons of an atom is exactly 4a then the substance is called
  29. The force of attraction or repulsion between two magnetic poles is inversely proportional to the square…
  30. The unit of flux is _____ in cgs system.