Which of the following is a natural magnet?

A. Steel

B. Magnesia

C. Lodestone

D. S oft iron

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  1. The amount of magnetizing force to counter balance the resid magnetic material is referred to as
  2. The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
  3. Electric potential is a _______ quantity.
  4. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
  5. The straight line passing through the two poles of magnet is called
  6. Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring…
  7. What is the SI unit of magnetic flux?
  8. ______ is an electromagnet with its core in the form of a close magnetic ring.
  9. Magnetic intensity is a
  10. A test charge means a charge of
  11. The magnetic field of a magnetized iron bar when strongly heated
  12. A permanent magnet does not exert a force on
  13. An alloy of 40 percent iron and 60 percent nickel.
  14. The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages.…
  15. The permittivity of a material is given by one of the following formulas.
  16. At/m is a unit of
  17. The conduction of electricity across the surface of a dielectric is called
  18. A magnetic material losses its ferromagnetic properties at a point called
  19. What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
  20. A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
  21. Which of the following statements is TRUE?
  22. When a conductor is stationary and the magnetic field is moving or changing the emf induced is called
  23. The resistivity of a conductor ___________ with an increase in temperature.
  24. The greater percentage of materials is _________.
  25. A theorem which states that an electric current flowing in a circuit produces a magnetic field at external…
  26. Paramagnetic substance has a relative permeability of
  27. A current if flowing east along a power line. If the earth's field is neglecteda the direction of the…
  28. One oersted (Oe) is equivalent to _____ Gb/cm.
  29. What determines the atomic number of an element?
  30. If the value of 25 of a conductor is 1/230 per oCa then the value of 0is