The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force is known as

A. Retentivity

B. Reluctivity

C. Resistivity

D. Conductivity

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  1. The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
  2. One weber of flux is equal to _______ magnetic lines of force.
  3. The temperature coefficient of resistance of semiconductors is
  4. One electron volt (1 eV) is equivalent to _____ joules
  5. Which of the following materials has permeability slightly less than that of free space?
  6. A permanent magnet does not exert a force on
  7. Back emf refers to the
  8. The core of a transformer heats up when its primary is fed from an ac source because of
  9. Electromotive force in a circuit
  10. The magnetic field around the conductor is determined by the
  11. If the value of 25 of a conductor is 1/230 per oCa then the value of 0is
  12. A negatively charge body has
  13. What is the usual value of leakage coefficient for electrical machines?
  14. If the length and area of cross-section of a wire are doubleda then its resistance
  15. Under ordinary conditionsa a body is considered
  16. Materials whose permeabilities are slightly greater than that of free space
  17. A negative ion results when an atom gains an additional
  18. Who developed the electromagnetic theory of light in 1862?
  19. The temperature coefficient of resistance of insulators is
  20. Who demonstrated the theory of electromagnetic induction in 1831?
  21. The force between two magnetic poles is _______ their pole strengths.
  22. The unit of flux is _____ in cgs system.
  23. States that the ratio of the thermal conductivity is proportional to the absolute temperature for all…
  24. Hysteresis is a phenomenon of _________ in a magnetic circuit.
  25. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  26. The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
  27. Lenz's law is the consequence of the law of conservation of
  28. The force between two charges placed a given distance apart ______ as the relative permittivity of the…
  29. The unit of flux density is
  30. The conduction of electricity across the surface of a dielectric is called