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All matters (gasa liquid and solid) are composed of

A. Neutrons

B. Particles

C. Electrons

D. Atoms

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  1. A positively charged body has
  2. Hydrogen is an example of a _____ material.
  3. A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional…
  4. Bonding of atoms that is due to the force of attraction between positive ions and a group of negative…
  5. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  6. A principle that states that only two electrons with different spins are allowed to exist in a given…
  7. The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
  8. Which of the following materials has permeability slightly less than that of free space?
  9. One of the solid structures in which the position of the atoms or ions are predetermined
  10. Another term for corona discharge.
  11. One weber of flux is equal to _______ magnetic lines of force.
  12. Electric field intensity at a point is numerically equal to ________ at that point.
  13. Electrons at the outer shell are called
  14. When the relative permeability of a material is slightly more than 1a it is called ______ material.
  15. The unit of electrical energy is
  16. The air space between poles of magnets
  17. The diameter of a hydrogen atom is approximately ______ cm.
  18. Electric field intensity is a ________.
  19. The quantity 10^6 maxwells is equivalent to one
  20. A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
  21. The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole…
  22. One oersted (Oe) is equivalent to _____ Gb/cm.
  23. The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force…
  24. All matters (gasa liquid and solid) are composed of
  25. Which element has four valence electrons?
  26. Which of the following has the highest permeability?
  27. If the value of 25 a conductor is 1/255 per oCa then the value of 20is
  28. Which of the following has the least number of valence electrons?
  29. Materials that have very high permeabilities (hundreds and even thousands times of that of free space)
  30. The evaporation of electrons from a heated surface is called