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The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.

A. Newton's first law

B. Faraday's first law of electromagnetic induction

C. Coulomb's first law

D. Coulomb's second law

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  1. The magnetic field of a magnetized iron bar when strongly heated
  2. Small voltages generated by a conductor with current in an external magnetic field.
  3. The lagging effect between flux density of the material and the magne
  4. The force between two magnetic poles is _____ the relative permeability of the medium.
  5. Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required…
  6. Who discovereda the relationship between magnetism and electricity that serves as the foundation for…
  7. It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.
  8. The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
  9. The unit of electrical energy is
  10. The point in a magnet where the intensity of magnetic lines of force is maximum
  11. This paper does not exhibit electricity because it contains the same number of
  12. The uncharged particles which have no effect on its atomic charge.
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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
  14. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  15. As the magnetic intensity decreasesa the relative permeability of a magnetic material
  16. A good conductor has how many valence electrons?
  17. Defined as the number of lines per unit area through any substance in a plane at right angles to the…
  18. What is the unit of magnetomotive force?
  19. A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing…
  20. Back emf refers to the
  21. The ratio of the total flux (flux in iron path) to the useful flux (flux in air gap)
  22. The physical motion resulting from the forces of magnetic fields is called
  23. Which of the following has the highest permeability?
  24. A magnetic material losses its ferromagnetic properties at a point called
  25. A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about…
  26. Defined as the flux density produced in it due to its own induced magnetism
  27. An effect which is generally used in the gausameter to measure flux density.
  28. What is the value of the absolute permittivity of air?
  29. The reluctance of a magnetic circuit varies with
  30. The unit of flux is _____ in cgs system.