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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. A magnetic material losses its ferromagnetic properties at a point called
  2. An atom or a group of atoms that carries a net electric charge.
  3. Electrons at the outer shell are called
  4. Calculate the permeability (in T/A. t/m) of a magnetic material that has a relative permeability of…
  5. What solid has no defined crystal structure except perhaps in the arrangement of the nearest neighboring…
  6. A current if flowing east along a power line. If the earth's field is neglecteda the direction of the…
  7. The direction of force o a current carrying conductor placed in a m found by
  8. The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
  9. The emf induced in a coil due to the changing current of another neighboring coil is called
  10. Which of the following materials has the highest dielectric strength?
  11. If the right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in…
  12. The tiniest element of matter
  13. The reluctance of a magnetic circuit is not dependent on which of the following?
  14. Back emf refers to the
  15. Under ordinary conditionsa a body is considered
  16. An electron- volt (eV) is a unit of
  17. A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional…
  18. One farad equals
  19. The air space between poles of magnets
  20. Permeance is analogous to
  21. A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing…
  22. The force between two magnetic poles is _____ the relative permeability of the medium.
  23. ______ is an electromagnet with its core in the form of a close magnetic ring.
  24. What is the main advantage of temporary magnets?
  25. What is the practical unit of electrical energy?
  26. When a current carrying conductor is placed in a magnetic fielda the maximum force will act on the conductor…
  27. What is the SI unit of specific resistance or resistivity?
  28. Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
  29. There are how many compounds available in nature?
  30. Mmf in a magnetic circuit corresponds to _____ in an electric circuit