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 straight line passing through the two poles of magnet is called
  2. Magnetic effects of the earth as a huge magnet with north and south poles.
  3. A 6- V battery is connected across a solenoid of 100 turns having a resistance of 2 ?a Calculate the…
  4. The magnetic materials should have a large hysteresis loss for one of the following applications.
  5. The science of adapting electronics to aerospace flight.
  6. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  7. Ohm's law can be used only to a _____ circuit or component.
  8. Gases whose particles are charged are known as
  9. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  10. If a magnetic flux cuts across 200 turns at a rate of 2Wb/sa the induced voltage according to Faraday's…
  11. Used to maintain strength of magnetic field
  12. What is the SI unit of conductivity?
  13. Permeance of a magnetic circuit is _________ the cross-sectional area of the circuit.
  14. What is used as the dielectric material in high voltage transformers?
  15. The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
  16. Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
  17. The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium…
  18. A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional…
  19. Mmf in a magnetic circuit corresponds to _____ in an electric circuit
  20. The mass of proton is __________ the mass of an electron.
  21. Permeability means
  22. There are how many compounds available in nature?
  23. The magnetic field inside a solenoid
  24. The air space between poles of magnets
  25. Who demonstrated the theory of electromagnetic induction in 1831?
  26. Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required…
  27. The force between two magnetic poles varies with the distance between them. The variation is ______…
  28. Electric field intensity at a point due to a given charge ______ if the relative permittivity of the…
  29. The property of a material which opposes the creation of magnetic flux in it
  30. The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…