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The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force is called

A. Leftover magnetism

B. Hysteresis

C. Residual magnetism

D. Coercivity

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  1. The magnetic potential in a magnetic circuit can be measured in terms of
  2. The reluctance of the magnetic circuit is ________ relative permeability of the material comprising…
  3. Materials whose permeabilities are slightly greater than that of free space
  4. If the number of valence electrons of an atom is less than 4a the substance is called
  5. This paper does not exhibit electricity because it contains the same number of
  6. At/m is a unit of
  7. The K shell or the first shell has how many permissible number of orbiting electrons?
  8. Core materials of a good relay have _________ hysteresis loop.
  9. Materials that have very high permeabilities (hundreds and even thousands times of that of free space)
  10. What is the relative permittivity of air?
  11. What revolves about the positive nucleus in a definite orbit?
  12. What solid has no defined crystal structure except perhaps in the arrangement of the nearest neighboring…
  13. A principle that states that only two electrons with different spins are allowed to exist in a given…
  14. One oersted (Oe) is equivalent to _____ Gb/cm.
  15. The force acting on a unit n- pole placed at that point is called
  16. A law relating between the magnetic and electric susceptibilities and the absolute temperatures which…
  17. Who discovered the most important electrical effects which is the magnetic effect?
  18. The electrons in the last orbit of an atom are called _______ electrons.
  19. Define as that pole which when placed in air from a similar and equal pole repels it with a force of…
  20. The property of a material which opposes the creation of magnetic flux in it
  21. How many electrons are needed in the valence orbit to give a material's stability?
  22. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  23. Lenz' law states that the direction of the induced emf and hence current
  24. Which of the following is a natural magnet?
  25. Electron is a Greek word for
  26. Which of the following materials has the highest dielectric strength?
  27. Back emf refers to the
  28. The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium…
  29. Magnetic effects of the earth as a huge magnet with north and south poles.
  30. Lenz's law is the consequence of the law of conservation of