How many electrons are needed in the valence orbit to give a material's stability?



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  1. Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
  2. An electron- volt (eV) is a unit of
  3. The uncharged particles which have no effect on its atomic charge.
  4. What is the usual value of leakage coefficient for electrical machines?
  5. A one cubic cm of copper has how many free electrons at room temperature?
  6. Refers to the non- metallic materials that have the ferromagnetic properties of iron.
  7. What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two…
  8. Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
  9. Cobalt is an example of a ______ material.
  10. Small voltages generated by a conductor with current in an external magnetic field.
  11. The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
  12. Electric field intensity is measured in
  13. Paramagnetic substance has a relative permeability of
  14. A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
  15. If the magnetic material is located within a coil through which alternating current (60 Hz frequency)…
  16. Which of the following is a natural magnet?
  17. Bonding of atoms that is due to the force of attraction between positive ions and a group of negative…
  18. Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying…
  19. What type of bond is formed when there exists some form of collective interactions between the (negatively…
  20. What is the SI unit of reluctance?
  21. Which of the following is a paramagnetic material?
  22. The amount of magnetizing force to counter balance the resid magnetic material is referred to as
  23. The emission of electrons from hot bodies is called
  24. Which of the following materials has the least hysteresis loop area?
  25. One that has magnetic poles produced by internal atomic structure with no external current necessary
  26. Hysteresis is a phenomenon of _________ in a magnetic circuit.
  27. Lenz's law is the consequence of the law of conservation of
  28. The B-H curve of ________ is not a straight line.
  29. The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
  30. Defined as the flux density produced in it due to its own induced magnetism