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Which of the following statements is TRUE?

A. Silicon dioxide is a good

B. The current carriers in conductors are valence electrons

C. For conductorsa the valence electron are strongly attracted to the nucleus

D. The valence electrons are located in the nucleus of an atom

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  1. An atom or a group of atoms that carries a net electric charge.
  2. The net electrical charge in an isolated system remains constant. This is known as
  3. Refers to the non- metallic materials that have the ferromagnetic properties of iron.
  4. Which of the following has the least number of valence electrons?
  5. What is the diameter of an atom?
  6. What is the cgs unit of magnetomotive force?
  7. Which of the following materials has permeability slightly less than that of free space?
  8. Lenz's law is the consequence of the law of conservation of
  9. One weber of flux is equal to _______ magnetic lines of force.
  10. Electric field intensity at a point is numerically equal to ________ at that point.
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    A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 10^-6
  12. The permeability of permalloy is
  13. The B-H curve for ________ is a straight line passing through the origin.
  14. The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization…
  15. If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
  16. Amorphous solid is also called
  17. Magnetic effects of the earth as a huge magnet with north and south poles.
  18. Steel is hard to magnetize because of its
  19. Electric field intensity is a ________.
  20. One farad equals
  21. What is the main advantage of temporary magnets?
  22. A good conductor has how many valence electrons?
  23. A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material…
  24. Electric lines of force leave or enter the charge surface at an angle of
  25. When the relative permeability of a material is slightly less than 1a it is called _____ material.
  26. Hydrogen is an example of a _____ material.
  27. The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
  28. A magnetic field is
  29. Permeability means
  30. How many neutrons does a copper atom have?