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Magnetic effects of the earth as a huge magnet with north and south poles.

A. Diamagnetic

B. Ferromagnetic

C. Terrestrial magnetism

D. Terrestrial ferromagnetism

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  1. The branch of Engineering which deals with the magnetic effect of electric current is known as
  2. The unit of electrical energy is
  3. A theorem which states that an electric current flowing in a circuit produces a magnetic field at external…
  4. Flux linkages equals
  5. Which of the following is used by temporary magnets as the magnetic material?
  6. The phenomenon by which a subtracts pieces of iron
  7. Which of the following materials has permeability slightly less than that of free space?
  8. How is mutual inductance between two coils decreased?
  9. When the relative permeability of a material is slightly more than 1a it is called ______ material.
  10. The evaporation of electrons from a heated surface is called
  11. The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization…
  12. The science of adapting electronics to aerospace flight.
  13. The dielectric constant of most materials lies between
  14. If the length and area of cross-section of a wire are doubleda then its resistance
  15. How much is the flux in Weber in the above problem?
  16. The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…
  17. If the magnetic material is located within a coil through which alternating current (60 Hz frequency)…
  18. The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
  19. Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
  20. If the value of 25 a conductor is 1/255 per oCa then the value of 20is
  21. What is the measure of the density and sign of the electric charge at a point relative to that at some…
  22. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  23. Permeance is analogous to
  24. What solid has no defined crystal structure except perhaps in the arrangement of the nearest neighboring…
  25. Which of the following is a paramagnetic material?
  26. It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.
  27. Germanium atom has ______ protons and ______ electrons.
  28. Hipernik is an alloy containing __________ iron and __________ nickel.
  29. The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…
  30. If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is