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The phenomenon by which a subtracts pieces of iron

A. Magnetism

B. Electromagnetism

C. Naturalism

D. Materialism

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  1. The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…
  2. What is the measure of the density and sign of the electric charge at a point relative to that at some…
  3. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  4. The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium…
  5. The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…
  6. The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
  7. What is the main advantage of temporary magnets?
  8. When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is
  9. Hydrogen is an example of a _____ material.
  10. An electron- volt (eV) is a unit of
  11. What bond is formed when one or more electrons in the outermost energy orbit of an atom are transferred…
  12. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  13. The temperature coefficient of resistance of conductors is
  14. States that the ratio of the thermal conductivity is proportional to the absolute temperature for all…
  15. The unit of flux is _____ in cgs system.
  16. What is used as the dielectric material in high voltage transformers?
  17. The temperature coefficient of resistance of insulators is
  18. Defined as a closed path in which magnetic induction or flux flows
  19. Magnetic intensity is a
  20. The straight line passing through the two poles of magnet is called
  21. The resistivity of a conductor ___________ with an increase in temperature.
  22. There are how many compounds available in nature?
  23. If the value of 25 a conductor is 1/255 per oCa then the value of 20is
  24. Permanent magnets can be found in
  25. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  26. If the value of 0 a conductor is 1/234 per oCa then the value of 18is
  27. The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force…
  28. The ability of a material to conduct magnetic flux through it.
  29. How much is the flux in Weber in the above problem?
  30. The ratio of the total flux (flux in iron path) to the useful flux (flux in air gap)