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A substance that attracts pieces iron

A. Conductor

B. Semiconductor

C. Magnet

D. All of the above

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  1. What determines the atomic number of an element?
  2. What is the SI unit of specific resistance or resistivity?
  3. The physical motion resulting from the forces of magnetic fields is called
  4. Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as
  5. The tiniest element of matter
  6. A germanium atom has an atomic weight of72. How many neutrons are there?
  7. The simplest type of atom to exist is the ______ atom.
  8. When the relative permeability of a material is much greater than 1a it is called _______ material.
  9. Who developed the electromagnetic theory of light in 1862?
  10. The evaporation of electrons from a heated surface is called
  11. This paper does not exhibit electricity because it contains the same number of
  12. If you hold the conductor with right hand so that the stretched thumb points in the direction of the…
  13. The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium…
  14. The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
  15. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
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    A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 10^-6
  17. Magnetic field intensity is a ________ quantity.
  18. The ratio of the permeability of material to the permiabiity of air or vacuum.
  19. When a conductor is stationary and the magnetic field is moving or changing the emf induced is called
  20. The phenomenon by which a subtracts pieces of iron
  21. Which of the following magnetic materials can be easily magnetized in both direction?
  22. One that has magnetic poles produced by internal atomic structure with no external current necessary
  23. Permeability means
  24. A negative ion results when an atom gains an additional
  25. Electric field intensity at a point is numerically equal to ________ at that point.
  26. What is the relative permittivity of air?
  27. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  28. Used to maintain strength of magnetic field
  29. Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring…
  30. If the relative permittivity of a material is 10a then its permittivity is