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Used to maintain strength of magnetic field

A. Container

B. Air gap

C. Keeper

D. S ource

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  1. If the number of valence electrons of an atom is more than 4a the substance is called
  2. The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force…
  3. The magnetic field inside a solenoid
  4. The tiniest element of matter
  5. Electron is a Greek word for
  6. Hysteresis loss can be reduced by one of the following.
  7. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  8. If you hold the conductor with right hand so that the stretched thumb points in the direction of the…
  9. Which of the following statements is TRUE?
  10. The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force…
  11. Which of the following is a vector quantity?
  12. Which of the following electric quantities is vector in character?
  13. The ability of a material to conduct magnetic flux through it.
  14. An electron- volt (eV) is a unit of
  15. When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is
  16. How is mutual inductance between two coils decreased?
  17. Back emf refers to the
  18. The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge…
  19. The quantity 10^6 maxwells is equivalent to one
  20. The branch of Engineering which deals with the magnetic effect of electric current is known as
  21. The force between two charges placed a given distance apart ______ as the relative permittivity of the…
  22. If the right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in…
  23. Ohm's law cannot be applied to which material?
  24. Which of the following is a paramagnetic material?
  25. The magnetic materials should have a large hysteresis loss for one of the following applications.
  26. Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring…
  27. The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
  28. The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole…
  29. What is the relative permittivity of air?
  30. The phenomenon that when an electric current passes through an anisotropic crystala there is an absorption…