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If the number of valence electrons of an atom is more than 4a the substance is called

A. a semiconductor

B. a conductor

C. an insulator

D. a semi-insulator

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  1. Electric potential is a _______ quantity.
  2. What solid has no defined crystal structure except perhaps in the arrangement of the nearest neighboring…
  3. Electric field intensity at a point is numerically equal to ________ at that point.
  4. Electronic current in a wire is the flow of ____________ electrons.
  5. The quantity 10^6 maxwells is equivalent to one
  6. A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional…
  7. Small voltages generated by a conductor with current in an external magnetic field.
  8. If the distance between two magnetic poles decreases by 2 timesa the force between them
  9. What is the diameter of an atom?
  10. If a magnetic flux cuts across 200 turns at a rate of 2Wb/sa the induced voltage according to Faraday's…
  11. In electro-mechanical conversion devices like generators and motors the reason why a small air gap is…
  12. Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
  13. When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is
  14. The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force…
  15. The air space between poles of magnets
  16. The force between two charges placed a given distance apart ______ as the relative permittivity of the…
  17. When a current carrying conductor is placed in a magnetic fielda the maximum force will act on the conductor…
  18. Mmf in a magnetic circuit corresponds to _____ in an electric circuit
  19. Which of the following materials has the least hysteresis loop area?
  20. A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…
  21. Ohm's law can be used only to a _____ circuit or component.
  22. Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
  23. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
  24. States that the ratio of the thermal conductivity is proportional to the absolute temperature for all…
  25. One weber of flux is equal to _______ magnetic lines of force.
  26. The net electrical charge in an isolated system remains constant. This is known as
  27. The resistance of a material is ____________ its area of cross-section.
  28. What is used as the insulating material or dielectric in an electric ion
  29. The customary energy unit in atomic and nuclear physics is
  30. Paramagnetic substance has a relative permeability of