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A law that states that the current in a thermionic diode varies directly with the three- halves power of anode voltage and inversely with the square of the distance between the electrodesa provided operating conditions are such that the current is limited only by the space charge.

A. Hall's law

B. Joule's law

C. Child's law

D. Coulomb's law

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  1. One that has magnetic poles produced by internal atomic structure with no external current necessary
  2. Hysteresis is a phenomenon of _________ in a magnetic circuit.
  3. Defined as a closed path in which magnetic induction or flux flows
  4. One of the common application of an air- cored choke.
  5. The reluctance of the magnetic circuit is ________ relative permeability of the material comprising…
  6. The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.
  7. The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
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    A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 10^-6
  9. An alloy of 22 percent iron and 78 per cent nickel.
  10. The unit of flux is _____ in cgs system.
  11. The force between two magnetic poles is _______ their pole strengths.
  12. States that the ratio of the thermal conductivity is proportional to the absolute temperature for all…
  13. Which of the following is a natural magnet?
  14. The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…
  15. What is the SI unit of conductivity?
  16. If the number of valence electrons of an atom is less than 4a the substance is called
  17. How many electrons are needed in the valence orbit to give a material's stability?
  18. When the relative permeability of a material is much greater than 1a it is called _______ material.
  19. If the number of valence electrons of an atom is more than 4a the substance is called
  20. What bond is formed when one or more electrons in the outermost energy orbit of an atom are transferred…
  21. A group of magnetically aligned atoms is called
  22. Magnetic field intensity is a ________ quantity.
  23. The electrons in the last orbit of an atom are called _______ electrons.
  24. What is another name for relative permittivity?
  25. Referred to as the specific reluctance of a material
  26. Paramagnetic substance has a relative permeability of
  27. Hipernik is an alloy containing __________ iron and __________ nickel.
  28. Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
  29. The quantity 10^6 maxwells is equivalent to one
  30. Gases whose particles are charged are known as