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. Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying…
  2. The force acting on a unit n- pole placed at that point is called
  3. Which of the following magnetic materials can be easily magnetized in both direction?
  4. Which of the following has the highest permeability?
  5. How many neutrons does a copper atom have?
  6. If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is
  7. The force between two magnetic poles is _______ their pole strengths.
  8. Which of the following is a paramagnetic material?
  9. The unit of flux density is
  10. The reluctance of a magnetic circuit is not dependent on which of the following?
  11. It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.
  12. If you hold the conductor with right hand so that the stretched thumb points in the direction of the…
  13. Who discovered the most important electrical effects which is the magnetic effect?
  14. The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force…
  15. Electric field intensity is measured in
  16. The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
  17. Magnetic fields do not interact with
  18. Ohm's law can be used only to a _____ circuit or component.
  19. The straight line passing through the two poles of magnet is called
  20. If the value of 0 a conductor is 1/234 per oCa then the value of 18is
  21. Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
  22. A one cubic cm of copper has how many free electrons at room temperature?
  23. A negatively charge body has
  24. Core materials of a good relay have _________ hysteresis loop.
  25. Electrons at the outer shell are called
  26. What is the measure of the density and sign of the electric charge at a point relative to that at some…
  27. The hot resistance of an incandescent lamp is about _______ its cold resistance.
  28. The evaporation of electrons from a heated surface is called
  29. Who discovered that a current-carrying conductor would move when placed in a magnetic field?
  30. __________ is a substance of whose molecules consist of the same kind of atom.