Home

One of the common application of an air- cored choke.

A. Radio frequency

B. Audio frequency

C. Power supply

D. Power transformer

You can do it
  1. One electron volt (1 eV) is equivalent to _____ joules
  2. If a magnetic flux cuts across 200 turns at a rate of 2Wb/sa the induced voltage according to Faraday's…
  3. A t/m is a unit of
  4. Which of the following materials has the highest dielectric strength?
  5. The reluctance of a magnetic circuit is not dependent on which of the following?
  6. Calculate the permeability (in T/A. t/m) of a magnetic material that has a relative permeability of…
  7. A negative ion results when an atom gains an additional
  8. One weber of flux is equal to _______ magnetic lines of force.
  9. A law relating between the magnetic and electric susceptibilities and the absolute temperatures which…
  10. The dielectric constant of most materials lies between
  11. Back emf refers to the
  12. Used to maintain strength of magnetic field
  13. An alloy of 22 percent iron and 78 per cent nickel.
  14. Cobalt is an example of a ______ material.
  15. How much is the flux in Weber in the above problem?
  16. The quantity 10^6 maxwells is equivalent to one
  17. The magnetic energy stored in an inductor is ______ current.
  18. If the number of valence electrons of an atom is exactly 4a then the substance is called
  19. Lenz's law is the consequence of the law of conservation of
  20. What is the usual value of leakage coefficient for electrical machines?
  21. Ohm's law cannot be applied to which material?
  22. What is the main advantage of temporary magnets?
  23. The point in a magnet where the intensity of magnetic lines of force is maximum
  24. When the relative permeability of a material is slightly more than 1a it is called ______ material.
  25. A germanium atom has an atomic weight of72. How many neutrons are there?
  26. A principle that states that only two electrons with different spins are allowed to exist in a given…
  27. Electric lines of force leave or enter the charge surface at an angle of
  28. The magnetic materials should have a large hysteresis loss for one of the following applications.
  29. The magnetic field of a bar magnet most closely resembles the magnetic field of
  30. A current if flowing east along a power line. If the earth's field is neglecteda the direction of the…