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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. The diameter of a hydrogen atom is approximately ______ cm.
  2. A factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.
  3. Referred to as the specific reluctance of a material
  4. If the length and area of cross-section of a wire are doubleda then its resistance
  5. The energy stored in an electrostatic field or electromagnetic field is called
  6. A negative ion results when an atom gains an additional
  7. What determines the atomic number of an element?
  8. The tiniest element of matter
  9. Who discovereda the relationship between magnetism and electricity that serves as the foundation for…
  10. If the value of 0 a conductor is 1/234 per oCa then the value of 18is
  11. What solid has no defined crystal structure except perhaps in the arrangement of the nearest neighboring…
  12. Hysteresis loss can be reduced by one of the following.
  13. Ohm's law cannot be applied to which material?
  14. __________ is a substance of whose molecules consist of the same kind of atom.
  15. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  16. A theorem which states that an electric current flowing in a circuit produces a magnetic field at external…
  17. One ampere- turn is equivalent to _____ gilberts
  18. States that the ratio of the thermal conductivity is proportional to the absolute temperature for all…
  19. How is mutual inductance between two coils decreased?
  20. The magnetic field of a magnetized iron bar when strongly heated
  21. ______ is an electromagnet with its core in the form of a close magnetic ring.
  22. A germanium atom has an atomic weight of72. How many neutrons are there?
  23. If the relative permittivity of a material is 10a then its permittivity is
  24. What is the SI unit of magnetic flux?
  25. The temperature coefficient of resistance of insulators is
  26. All magnetic field originates from
  27. Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
  28. The relative permeability of a magnetic material is 10^5. What is its permeability?
  29. Back emf refers to the
  30. The ratio between the intensity of magnetization produced in a substance to the magnetizing force producing…