The ratio of the permeability of material to the permiabiity of air or vacuum.

A. Relative permeability

B. Relative permittivity

C. Relative conductivity

D. Relative reluctivity

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  1. An electron- volt (eV) is a unit of
  2. Which of the following magnetic materials can be easily magnetized in both direction?
  3. The branch of Engineering which deals with the magnetic effect of electric current is known as
  4. One weber of flux is equal to _______ magnetic lines of force.
  5. Hysteresis loss can be reduced by one of the following.
  6. A permanent magnet does not exert a force on
  7. Steel is hard to magnetize because of its
  8. The temperature coefficient of resistance of eureka is
  9. If the number of valence electrons of an atom is less than 4a the substance is called
  10. What is the usual value of leakage coefficient for electrical machines?
  11. What is the diameter of an atom?
  12. How many electrons are needed in the valence orbit to give a material's stability?
  13. What is the SI unit of conductance?
  14. The unit of electrical energy is
  15. A magnetic material losses its ferromagnetic properties at a point called
  16. Which of the following is a paramagnetic material?
  17. States that the ratio of the thermal conductivity is proportional to the absolute temperature for all…
  18. The temperature coefficient of resistance of insulators is
  19. At/m is a unit of
  20. One ampere- turn is equivalent to _____ gilberts
  21. Who discovereda the relationship between magnetism and electricity that serves as the foundation for…
  22. The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
  23. The reluctance of a magnetic circuit is not dependent on which of the following?
  24. What revolves about the positive nucleus in a definite orbit?
  25. The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
  26. Which of the following is used by temporary magnets as the magnetic material?
  27. One of the solid structures in which the position of the atoms or ions are predetermined
  28. If the solenoid is gripped by the right hand with the fingers pointing the direction of current flowa…
  29. If the number of valence electrons of an atom is exactly 4a then the substance is called
  30. The magnetic energy stored in an inductor is ______ current.