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  1. Electric lines of force leave or enter the charge surface at an angle of
  2. What determines the atomic number of an element?
  3. An alloy of 22 percent iron and 78 per cent nickel.
  4. A 200-watt lamp working for 24 hours will consume approximately _____ units.
  5. What is another name for relative permittivity?
  6. The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force…
  7. The core of a magnetic equipment uses a magnetic material with
  8. A principle that states that only two electrons with different spins are allowed to exist in a given…
  9. A permanent magnet does not exert a force on
  10. A magnetizing force of 1000 AT/m will produce a flux density of __________ i
  11. A test charge means a charge of
  12. The evaporation of electrons from a heated surface is called
  13. The magnetic materials should have a large hysteresis loss for one of the following applications.
  14. The B-H curve for ________ is a straight line passing through the origin.
  15. The force acting on a unit n- pole placed at that point is called
  16. The dielectric constant of most materials lies between
  17. One ampere- turn is equivalent to _____ gilberts
  18. Which of the following has the least number of valence electrons?
  19. The magnetic potential in a magnetic circuit can be measured in terms of
  20. Which of the following magnetic materials can be easily magnetized in both direction?
  21. What is the unit of reluctance?
  22. Materials that have very high permeabilities (hundreds and even thousands times of that of free space)
  23. Which of the following materials has the least hysteresis loop area?
  24. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  25. The electric flux density is a ________ quantity.
  26. Permanent magnets can be found in
  27. Calculate the permeability (in T/A. t/m) of a magnetic material that has a relative permeability of…
  28. Who discovereda the relationship between magnetism and electricity that serves as the foundation for…
  29. The branch of Engineering which deals with the magnetic effect of electric current is known as
  30. A negative ion results when an atom gains an additional