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Who discovered the most important electrical effects which is the magnetic effect?

A. Hans Christian Oersted

B. Sir Charles Wheatstone

C. Georg Ohm

D. James Clerk Maxwell

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  1. The electric flux density is a ________ quantity.
  2. If the number of valence electrons of an atom is less than 4a the substance is called
  3. A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing…
  4. The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…
  5. What determines the atomic number of an element?
  6. The unit of flux is _____ in cgs system.
  7. The lagging effect between flux density of the material and the magne
  8. The force between two magnetic poles is _____ the relative permeability of the medium.
  9. If the value of 25 a conductor is 1/255 per oCa then the value of 20is
  10. The idea of preventing one component from affecting another through their common electric and magnetic…
  11. Permanent magnets can be found in
  12. The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge…
  13. What is the unit of magnetomotive force?
  14. The reluctance of the magnetic circuit is ________ relative permeability of the material comprising…
  15. The core of a magnetic equipment uses a magnetic material with
  16. The B-H curve for ________ is a straight line passing through the origin.
  17. One of the common application of an air- cored choke.
  18. In electro-mechanical conversion devices like generators and motors the reason why a small air gap is…
  19. A magnetic field is
  20. The evaporation of electrons from a heated surface is called
  21. One of the solid structures in which the position of the atoms or ions are predetermined
  22. What is used as the insulating material or dielectric in an electric ion
  23. The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
  24. A negative ion results when an atom gains an additional
  25. Amorphous solid is also called
  26. What is the relative permittivity of air?
  27. The total number of magnetic lines of force in a magnetic field is called
  28. The temperature coefficient of resistance of insulators is
  29. The physical motion resulting from the forces of magnetic fields is called
  30. The emf induced in a coil due to the change of its own flux linked with it is called