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Which of the following is used by permanent magnets as the magnetic material?

A. iron

B. nickel

C. soft steel

D. hardened steel

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  1. What is the main advantage of temporary magnets?
  2. Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
  3. Magnetic field intensity is a ________ quantity.
  4. The magnetic field of a bar magnet most closely resembles the magnetic field of
  5. If the right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in…
  6. What determines the value of the temperature coefficient of resistance of a material?
  7. Used to maintain strength of magnetic field
  8. A magnetic field is
  9. Electron is a Greek word for
  10. A germanium atom has an atomic weight of72. How many neutrons are there?
  11. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  12. If the solenoid is gripped by the right hand with the fingers pointing the direction of current flowa…
  13. The temperature coefficient of resistance of semiconductors is
  14. One of the solid structures in which the position of the atoms or ions are predetermined
  15. The net electrical charge in an isolated system remains constant. This is known as
  16. One that has magnetic poles produced by internal atomic structure with no external current necessary
  17. The greater percentage of materials is _________.
  18. What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5…
  19. There are how many compounds available in nature?
  20. If you hold the conductor with right hand so that the stretched thumb points in the direction of the…
  21. The magnetic flux through a wire loop in a magnetic field does not d
  22. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  23. An effect which is generally used in the gausameter to measure flux density.
  24. The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole…
  25. The magnetic flux of 2000 lines is how many Maxwells?
  26. The force between two magnetic poles is _____ the relative permeability of the medium.
  27. Electric field intensity is measured in
  28. What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
  29. The relative permeability of a magnetic material is 10^5. What is its permeability?
  30. Which of the following has the highest permeability?