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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. Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability…
  2. Which of the following is a natural magnet?
  3. If the value of 25 a conductor is 1/255 per oCa then the value of 20is
  4. Defined as the ratio of the volume occupied by the atoms or ions in a unit cell divided by the volume…
  5. A t/m is a unit of
  6. Electron is a Greek word for
  7. Hydrogen is an example of a _____ material.
  8. What is the unit of magnetomotive force?
  9. A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional…
  10. The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole…
  11. Electric field intensity is a ________.
  12. The air space between poles of magnets
  13. The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?
  14. Magnetic fields do not interact with
  15. The temperature coefficient of resistance of conductors is
  16. Another term for corona discharge.
  17. A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…
  18. A germanium atom has an atomic weight of72. How many neutrons are there?
  19. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  20. When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is
  21. If the number of valence electrons of an atom is exactly 4a then the substance is called
  22. The temperature coefficient of resistance of eureka is
  23. What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
  24. The unit of flux density is
  25. Electromotive force in a circuit
  26. An electron- volt (eV) is a unit of
  27. Electric potential is a _______ quantity.
  28. If the distance between two magnetic poles decreases by 2 timesa the force between them
  29. A law that states that the current in a thermionic diode varies directly with the three- halves power…
  30. The core of a transformer heats up when its primary is fed from an ac source because of