The straight line passing through the two poles of magnet is called

A. Real axis

B. Cartesian axis

C. Magnetic axis

D. Imaginary axis

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  1. The core of a transformer heats up when its primary is fed from an ac source because of
  2. If the length and area of cross-section of a wire are doubleda then its resistance
  3. A theorem which states that an electric current flowing in a circuit produces a magnetic field at external…
  4. The unit of flux density is
  5. The magnetic potential in a magnetic circuit can be measured in terms of
  6. There are how many compounds available in nature?
  7. Which of the following is a paramagnetic material?
  8. What is another name for relative permittivity?
  9. Which of the following materials has the least hysteresis loop area?
  10. What is the unit of magnetomotive force?
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    A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 10^-6
  12. What is the unit of reluctance?
  13. The customary energy unit in atomic and nuclear physics is
  14. In electro-mechanical conversion devices like generators and motors the reason why a small air gap is…
  15. Which of the following statements is TRUE?
  16. Under ordinary conditionsa a body is considered
  17. Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying…
  18. The point in a magnet where the intensity of magnetic lines of force is maximum
  19. Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
  20. One farad equals
  21. The force between two magnetic poles is _______ their pole strengths.
  22. One that has magnetic poles produced by internal atomic structure with no external current necessary
  23. When the relative permeability of a material is much greater than 1a it is called _______ material.
  24. If on looking at any one end of a solenoid; the direction of current flow is found to be clockwise then…
  25. The direction of force o a current carrying conductor placed in a m found by
  26. Referred to as the specific reluctance of a material
  27. One electron volt (1 eV) is equivalent to _____ joules
  28. What determines the atomic number of an element?
  29. A 6- V battery is connected across a solenoid of 100 turns having a resistance of 2 ?a Calculate the…
  30. Back emf refers to the