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Used to maintain strength of magnetic field

A. Container

B. Air gap

C. Keeper

D. S ource

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  1. When a conductor is stationary and the magnetic field is moving or changing the emf induced is called
  2. One coulomb of charge consists of ________ electrons.
  3. One weber of flux is equal to _______ magnetic lines of force.
  4. The permittivity of a material is given by one of the following formulas.
  5. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  6. Which of the following is a vector quantity?
  7. Magnetic fields do not interact with
  8. If a magnetic flux cuts across 200 turns at a rate of 2Wb/sa the induced voltage according to Faraday's…
  9. The mass of proton is __________ the mass of an electron.
  10. Which of the following statements is TRUE?
  11. The tiniest element of matter
  12. The emf induced in a coil due to the changing current of another neighboring coil is called
  13. Referred to as the specific reluctance of a material
  14. Which of the following has the least number of valence electrons?
  15. The dielectric constant of most materials lies between
  16. The reluctance of a magnetic circuit varies with
  17. What is used as the dielectric material in high voltage transformers?
  18. How much is the flux in Weber in the above problem?
  19. If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
  20. The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
  21. Ohm's law can be used only to a _____ circuit or component.
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    When the current flowsa the magnetic field . conductor is in what direction?
  23. The air space between poles of magnets
  24. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  25. Permeability means
  26. The force acting on a unit n- pole placed at that point is called
  27. The property of a material which opposes the creation of magnetic flux in it
  28. Calculate the permeability (in T/A. t/m) of a magnetic material that has a relative permeability of…
  29. A magnetic field is
  30. The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?