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The force of attraction or repulsion between two magnetic poles is inversely proportional to the square of the distance between them. This is known as

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 process by which an emf and hence current is generated or induced in a conductor when there is a…
  2. There are how many compounds available in nature?
  3. How many electrons are needed in the valence orbit to give a material's stability?
  4. If the value of 25 of a conductor is 1/230 per oCa then the value of 0is
  5. The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages.…
  6. An alloy of 22 percent iron and 78 per cent nickel.
  7. The simplest type of atom to exist is the ______ atom.
  8. When a conductor is stationary and the magnetic field is moving or changing the emf induced is called
  9. Back emf refers to the
  10. The K shell or the first shell has how many permissible number of orbiting electrons?
  11. Which of the following is a natural magnet?
  12. If the number of valence electrons of an atom is less than 4a the substance is called
  13. The unit of flux density is
  14. A 200-watt lamp working for 24 hours will consume approximately _____ units.
  15. One coulomb of charge consists of ________ electrons.
  16. A germanium atom has an atomic weight of72. How many neutrons are there?
  17. The hot resistance of an incandescent lamp is about _______ its cold resistance.
  18. The branch of Engineering which deals with the magnetic effect of electric current is known as
  19. If the number of valence electrons of an atom is less than 4a then the substance is probably
  20. Who demonstrated the theory of electromagnetic induction in 1831?
  21. The tiniest element of matter
  22. Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability…
  23. One of the solid structures in which the position of the atoms or ions are predetermined
  24. How much is the flux in Weber in the above problem?
  25. How is mutual inductance between two coils decreased?
  26. An electron- volt (eV) is a unit of
  27. A one cubic cm of copper has how many free electrons at room temperature?
  28. A test charge means a charge of
  29. Materials that have very high permeabilities (hundreds and even thousands times of that of free space)
  30. A magnetic material losses its ferromagnetic properties at a point called