A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about 12 grades.

A. Alnico

B. Brass

C. Aluminum

D. Constantan

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  1. A good conductor has how many valence electrons?
  2. Which of the following is a natural magnet?
  3. The reluctance of a magnetic circuit varies with
  4. Magnetic field intensity is a ________ quantity.
  5. Cobalt is an example of a ______ material.
  6. The hot resistance of an incandescent lamp is about _______ its cold resistance.
  7. Electron is a Greek word for
  8. Permeance is analogous to
  9. What is the other name for dielectric strength?
  10. One weber of flux is equal to _______ magnetic lines of force.
  11. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  12. Ohm's law cannot be applied to which material?
  13. What is the unit of magnetomotive force?
  14. Which of the following is used by permanent magnets as the magnetic material?
  15. At/m is a unit of
  16. What is the SI unit of magnetic flux?
  17. The K shell or the first shell has how many permissible number of orbiting electrons?
  18. Flux density is measured in
  19. Magnetic intensity is a
  20. Lenz's law is the consequence of the law of conservation of
  21. What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
  22. When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is
  23. Bonding of atoms that is due to the force of attraction between positive ions and a group of negative…
  24. The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…
  25. Which of the following materials has permeability slightly less than that of free space?
  26. A 200-watt lamp working for 24 hours will consume approximately _____ units.
  27. A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
  28. The electrons in the last orbit of an atom are called _______ electrons.
  29. A magnetizing force of 1000 AT/m will produce a flux density of __________ i
  30. What is the cgs unit of magnetomotive force?