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  1. Which of the following materials has the least hysteresis loop area?
  2. What is the practical unit of electrical energy?
  3. The K shell or the first shell has how many permissible number of orbiting electrons?
  4. The greater percentage of materials is _________.
  5. The force acting on a unit n- pole placed at that point is called
  6. Defined as a closed path in which magnetic induction or flux flows
  7. __________ is a substance of whose molecules consist of the same kind of atom.
  8. The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
  9. What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
  10. The force between two magnetic poles varies with the distance between them. The variation is ______…
  11. Who discovered superconductivity in 1911?
  12. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  13. An electron- volt (eV) is a unit of
  14. A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional…
  15. The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization…
  16. Temporary magnets are commonly employed in
  17. Permanent magnets can be found in
  18. Which of the following is a natural magnet?
  19. Which element has four valence electrons?
  20. A test charge means a charge of
  21. The emf produced in a wire by its motion across a magnetic field does not depend upon the
  22. When the relative permeability of a material is slightly less than 1a it is called _____ material.
  23. What is the main advantage of temporary magnets?
  24. The force between two magnetic poles is _______ their pole strengths.
  25. Electric field intensity at a point is numerically equal to ________ at that point.
  26. The permeability of permalloy is
  27. There are how many compounds available in nature?
  28. The branch of Engineering which deals with the magnetic effect of electric current is known as
  29. Which of the following electric quantities is vector in character?
  30. A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material…