States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.

A. Wien's displacement law

B. Hartleys law

C. Hall's law

D. Wiedemann Franz law

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  1. The magnetic field around the conductor is determined by the
  2. Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
  3. Theory of ferromagnetic phenomena which assumes each atom is a permanent magnet which can turn freely…
  4. What is the SI unit of specific resistance or resistivity?
  5. Back emf refers to the
  6. Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field…
  7. One oersted (Oe) is equivalent to _____ Gb/cm.
  8. Which of the following materials has permeability slightly less than that of free space?
  9. Temporary magnets are commonly employed in
  10. What is the SI unit of conductivity?
  11. A permanent magnet does not exert a force on
  12. Permeability means
  13. Lenz' law states that the direction of the induced emf and hence current
  14. A test charge means a charge of
  15. How many electrons are needed in the valence orbit to give a material's stability?
  16. A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about…
  17. The electrons in the last orbit of an atom are called _______ electrons.
  18. Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as
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  20. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  21. Flux linkages equals
  22. The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
  23. Which of the following statements is TRUE?
  24. The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab…
  25. The ratio of the total flux (flux in iron path) to the useful flux (flux in air gap)
  26. The force which set ups or tends to set up magnetic flux in a magnetic circuit
  27. All magnetic field originates from
  28. One electron volt (1 eV) is equivalent to _____ joules
  29. The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
  30. When a wire loop is rotated in a magnetic field the direction of the induced emf changes one in every…