Who demonstrated the theory of electromagnetic induction in 1831?

A. Michael Faraday

B. Andre Ampere

C. James Clerk Maxwell

D. Charles Coulomb

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  1. Hysteresis is a phenomenon of _________ in a magnetic circuit.
  2. The magnetic field of a magnetized iron bar when strongly heated
  3. The resistance of a material is ____________ its area of cross-section.
  4. Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
  5. The air space between poles of magnets
  6. The force between two magnetic poles is _____ the relative permeability of the medium.
  7. If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
  8. The total number of magnetic lines of force in a magnetic field is called
  9. The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
  10. What is the SI unit of reluctance?
  11. The phenomenon that when an electric current passes through an anisotropic crystala there is an absorption…
  12. The reluctance of the magnetic circuit is ________ relative permeability of the material comprising…
  13. Lenz's law is the consequence of the law of conservation of
  14. The emf induced in a coil due to the changing current of another neighboring coil is called
  15. The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole…
  16. The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
  17. If the number of valence electrons of an atom is exactly 4a then the substance is called
  18. The force acting on a unit n- pole placed at that point is called
  19. Which element has four valence electrons?
  20. Electromotive force in a circuit
  21. As the magnetic intensity decreasesa the relative permeability of a magnetic material
  22. A negative ion results when an atom gains an additional
  23. The electrons in the last orbit of an atom are called _______ electrons.
  24. What bond is formed when one or more electrons in the outermost energy orbit of an atom are transferred…
  25. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  26. There are how many compounds available in nature?
  27. Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field…
  28. A law relating between the magnetic and electric susceptibilities and the absolute temperatures which…
  29. A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
  30. The energy stored in an electrostatic field or electromagnetic field is called