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What revolves about the positive nucleus in a definite orbit?

A. Atom

B. Proton

C. Electron

D. Neutron

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  1. If on looking at any one end of a solenoid; the direction of current flow is found to be clockwise then…
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    A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 10^-6
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    If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 10^-8 ?a then its resistivity is
  4. Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
  5. A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material…
  6. What is the cgs unit of magnetomotive force?
  7. Defined as the ratio of the volume occupied by the atoms or ions in a unit cell divided by the volume…
  8. The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?
  9. Flux density is measured in
  10. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
  11. Which of the following electric quantities is vector in character?
  12. Electron is a Greek word for
  13. Another term for corona discharge.
  14. A positively charged body has
  15. When the relative permeability of a material is slightly less than 1a it is called _____ material.
  16. A theorem which states that an electric current flowing in a circuit produces a magnetic field at external…
  17. The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
  18. Used to maintain strength of magnetic field
  19. Electric field intensity at a point due to a given charge ______ if the relative permittivity of the…
  20. A magnetic circuit carries a flux iin the iron part and a fluxgin the air gap. What is the leakage coefficient?
  21. Which of the following is a natural magnet?
  22. Permeance is analogous to
  23. If the value of 25 of a conductor is 1/230 per oCa then the value of 0is
  24. How much is the flux in Weber in the above problem?
  25. Mmf in a magnetic circuit corresponds to _____ in an electric circuit
  26. Ohm's law can be used only to a _____ circuit or component.
  27. What is the typical saturation flux density for most magnetic materials?
  28. If the length and area of cross-section of a wire are doubleda then its resistance
  29. As the magnetic intensity decreasesa the relative permeability of a magnetic material
  30. What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5…