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Magnetic effects of the earth as a huge magnet with north and south poles.

A. Diamagnetic

B. Ferromagnetic

C. Terrestrial magnetism

D. Terrestrial ferromagnetism

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  1. Define as that pole which when placed in air from a similar and equal pole repels it with a force of…
  2. Hydrogen is an example of a _____ material.
  3. The force between two charges placed a given distance apart ______ as the relative permittivity of the…
  4. Who developed the electromagnetic theory of light in 1862?
  5. If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 ×10^-8 ?a then…
  6. The lagging effect between flux density of the material and the magne
  7. Who discovered superconductivity in 1911?
  8. The permittivity of a material is given by one of the following formulas.
  9. When the relative permeability of a material is slightly less than 1a it is called _____ material.
  10. What is used as the dielectric material in high voltage transformers?
  11. If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
  12. The magnetic potential in a magnetic circuit can be measured in terms of
  13. A magnetizing force of 1000 AT/m will produce a flux density of __________ i
  14. The quantity 10^6 maxwells is equivalent to one
  15. A magnetic material losses its ferromagnetic properties at a point called
  16. Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability…
  17. A law that states that the current in a thermionic diode varies directly with the three- halves power…
  18. Small voltages generated by a conductor with current in an external magnetic field.
  19. A germanium atom has an atomic weight of72. How many neutrons are there?
  20. Which of the following materials has the least hysteresis loop area?
  21. The force between two magnetic poles varies with the distance between them. The variation is ______…
  22. A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about…
  23. The phenomenon by which a subtracts pieces of iron
  24. When the relative permeability of a material is much greater than 1a it is called _______ material.
  25. If on looking at any one end of a solenoid; the direction of current flow is found to be clockwise then…
  26. The B-H curve of ________ is not a straight line.
  27. Electrons at the outer shell are called
  28. The B-H curve for ________ is a straight line passing through the origin.
  29. Magnetic effects of the earth as a huge magnet with north and south poles.
  30. Hysteresis is a phenomenon of _________ in a magnetic circuit.