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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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  2. A principle that states that only two electrons with different spins are allowed to exist in a given…
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  5. The reluctance of a magnetic circuit is not dependent on which of the following?
  6. Electric field intensity is a ________.
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  13. The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
  14. Which of the following is a natural magnet?
  15. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  16. Who discovered superconductivity in 1911?
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  18. Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
  19. Which of the following materials has the least hysteresis loop area?
  20. The greater percentage of materials is _________.
  21. Electric lines of force leave or enter the charge surface at an angle of
  22. If the value of 25 a conductor is 1/255 per oCa then the value of 20is
  23. A germanium atom has an atomic weight of72. How many neutrons are there?
  24. What determines the atomic number of an element?
  25. What is the usual value of leakage coefficient for electrical machines?
  26. Defined as the flux density produced in it due to its own induced magnetism
  27. If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
  28. What is the SI unit of reluctance?
  29. If you hold the conductor with right hand so that the stretched thumb points in the direction of the…
  30. The permittivity of a material is given by one of the following formulas.