The B-H curve for ________ is a straight line passing through the origin.

A. cobalt

B. air

C. hardened steel

D. soft iron

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  1. The temperature coefficient of resistance of eureka is
  2. A law that states that the current in a thermionic diode varies directly with the three- halves power…
  3. When the relative permeability of a material is slightly more than 1a it is called ______ material.
  4. A t/m is a unit of
  5. Refers to the non- metallic materials that have the ferromagnetic properties of iron.
  6. Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required…
  7. Cobalt is an example of a ______ material.
  8. Magnetic effects of the earth as a huge magnet with north and south poles.
  9. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
  10. Defined as a closed path in which magnetic induction or flux flows
  11. Referred to as the specific reluctance of a material
  12. If the solenoid is gripped by the right hand with the fingers pointing the direction of current flowa…
  13. The ratio of the permeability of material to the permiabiity of air or vacuum.
  14. A current if flowing east along a power line. If the earth's field is neglecteda the direction of the…
  15. The tiniest element of matter
  16. One of the common application of an air- cored choke.
  17. Electric field intensity is measured in
  18. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  19. The relative permeability of a magnetic material is 10^5. What is its permeability?
  20. The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
  21. Electronic current in a wire is the flow of ____________ electrons.
  22. The resistance of a material is ____________ its area of cross-section.
  23. All matters (gasa liquid and solid) are composed of
  24. The temperature coefficient of resistance of semiconductors is
  25. If the relative permittivity of a material is 10a then its permittivity is
  26. The unit of flux density is
  27. The unit of flux is _____ in cgs system.
  28. If a magnetic flux cuts across 200 turns at a rate of 2Wb/sa the induced voltage according to Faraday's…
  29. Temporary magnets are commonly employed in
  30. The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium…