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The permeability of permalloy is

A. Very much greater than permeability of air

B. Slightly greater than permeability of air

C. Slightly less than permeability of air

D. Equal to the permeability of air

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  1. What is the unit of magnetomotive force?
  2. How is mutual inductance between two coils decreased?
  3. When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is
  4. If the distance between two magnetic poles decreases by 2 timesa the force between them
  5. The idea of preventing one component from affecting another through their common electric and magnetic…
  6. Germanium atom has ______ protons and ______ electrons.
  7. A test charge means a charge of
  8. The permittivity of a material is given by one of the following formulas.
  9. Magnetic effects of the earth as a huge magnet with north and south poles.
  10. One weber of flux is equal to _______ magnetic lines of force.
  11. A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…
  12. Amorphous solid is also called
  13. What is the diameter of an atom?
  14. One electron volt (1 eV) is equivalent to _____ joules
  15. A positively charged body has
  16. What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two…
  17. The temperature coefficient of resistance of semiconductors is
  18. The magnetic field of a bar magnet most closely resembles the magnetic field of
  19. Lenz' law states that the direction of the induced emf and hence current
  20. What is the measure of the density and sign of the electric charge at a point relative to that at some…
  21. Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
  22. A theorem which states that an electric current flowing in a circuit produces a magnetic field at external…
  23. Permeance of a magnetic circuit is _________ the cross-sectional area of the circuit.
  24. What is the usual value of leakage coefficient for electrical machines?
  25. Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required…
  26. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  27. The ratio of the permeability of material to the permiabiity of air or vacuum.
  28. A principle that states that only two electrons with different spins are allowed to exist in a given…
  29. A magnetizing force of 1000 AT/m will produce a flux density of __________ i
  30. Materials whose permeabilities are slightly greater than that of free space