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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. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  2. Magnetic intensity is a
  3. What is the typical saturation flux density for most magnetic materials?
  4. All matters (gasa liquid and solid) are composed of
  5. Materials whose permeabilities are slightly greater than that of free space
  6. Define as that pole which when placed in air from a similar and equal pole repels it with a force of…
  7. If the solenoid is gripped by the right hand with the fingers pointing the direction of current flowa…
  8. The magnetic field around the conductor is determined by the
  9. The diameter of a hydrogen atom is approximately ______ cm.
  10. The core of a magnetic equipment uses a magnetic material with
  11. What is the diameter of an atom?
  12. Magnetic field intensity is a ________ quantity.
  13. Which of the following is a vector quantity?
  14. A magnetic circuit carries a flux iin the iron part and a fluxgin the air gap. What is the leakage coefficient?
  15. Electron is a Greek word for
  16. A magnetic material losses its ferromagnetic properties at a point called
  17. Amorphous solid is also called
  18. The reluctance of a magnetic circuit is not dependent on which of the following?
  19. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
  20. Permanent magnets can be found in
  21. If a magnetic flux cuts across 200 turns at a rate of 2Wb/sa the induced voltage according to Faraday's…
  22. Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required…
  23. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  24. Which of the following statements is TRUE?
  25. Which of the following is used by permanent magnets as the magnetic material?
  26. A magnetic field is
  27. Which of the following materials has permeability slightly less than that of free space?
  28. There are how many compounds available in nature?
  29. The force which set ups or tends to set up magnetic flux in a magnetic circuit
  30. The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…