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. The magnetic field of a magnetized iron bar when strongly heated
  2. Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
  3. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
  4. The magnetic materials should have a large hysteresis loss for one of the following applications.
  5. The branch of Engineering which deals with the magnetic effect of electric current is known as
  6. This paper does not exhibit electricity because it contains the same number of
  7. Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
  8. The emission of electrons from hot bodies is called
  9. What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two…
  10. What revolves about the positive nucleus in a definite orbit?
  11. The total number of magnetic lines of force in a magnetic field is called
  12. A t/m is a unit of
  13. What type of bond is formed when there exists some form of collective interactions between the (negatively…
  14. A negative ion results when an atom gains an additional
  15. If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
  16. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  17. A law that states that the current in a thermionic diode varies directly with the three- halves power…
  18. Electric field intensity at a point due to a given charge ______ if the relative permittivity of the…
  19. A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional…
  20. Ohm's law can be used only to a _____ circuit or component.
  21. Electric field intensity is a ________.
  22. Core materials of a good relay have _________ hysteresis loop.
  23. The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab…
  24. The air space between poles of magnets
  25. What is the diameter of an atom?
  26. Under ordinary conditionsa a body is considered
  27. What is the usual value of leakage coefficient for electrical machines?
  28. A 200-watt lamp working for 24 hours will consume approximately _____ units.
  29. One coulomb of charge consists of ________ electrons.
  30. The force between two charges placed a given distance apart ______ as the relative permittivity of the…