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Who developed the electromagnetic theory of light in 1862?

A. Heinrich Rudolf Hertz

B. Wilhelm Rontgen

C. James Clerk Maxwell

D. Andre Ampere

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  1. Calculate the permeability (in T/A. t/m) of a magnetic material that has a relative permeability of…
  2. What is the SI unit of magnetic flux?
  3. The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
  4. The total number of magnetic lines of force in a magnetic field is called
  5. Ohm's law can be used only to a _____ circuit or component.
  6. What is the practical unit of electrical energy?
  7. The magnetic field of a magnetized iron bar when strongly heated
  8. A law that states that the current in a thermionic diode varies directly with the three- halves power…
  9. The magnetic field around the conductor is determined by the
  10. A factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.
  11. Materials whose permeabilities are slightly greater than that of free space
  12. The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…
  13. What revolves about the positive nucleus in a definite orbit?
  14. The B-H curve for ________ is a straight line passing through the origin.
  15. When the relative permeability of a material is much greater than 1a it is called _______ material.
  16. Permanent magnets can be found in
  17. Cobalt is an example of a ______ material.
  18. __________ is a substance of whose molecules consist of the same kind of atom.
  19. Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field…
  20. A substance that attracts pieces iron
  21. What type of bond is formed when there exists some form of collective interactions between the (negatively…
  22. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  23. Magnetic field intensity is a ________ quantity.
  24. What principle states that each electron in an atom must have a different set of quantum numbers?
  25. A magnetic circuit carries a flux iin the iron part and a fluxgin the air gap. What is the leakage coefficient?
  26. What determines the value of the temperature coefficient of resistance of a material?
  27. The ability of a material to conduct magnetic flux through it.
  28. The force of attraction or repulsion between two magnetic poles is inversely proportional to the square…
  29. Which of the following is used by permanent magnets as the magnetic material?
  30. A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material…