Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying conductors can attract and repel each other just like magnets?

A. Luigi Galvani

B. Hans Christian Oersted

C. Charles Coulomb

D. Andre Ampere

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  1. What is the typical saturation flux density for most magnetic materials?
  2. Which of the following is used by permanent magnets as the magnetic material?
  3. The force of attraction or repulsion between two magnetic poles is inversely proportional to the square…
  4. Permeance is analogous to
  5. The hot resistance of an incandescent lamp is about _______ its cold resistance.
  6. A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material…
  7. The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
  8. Lenz' law states that the direction of the induced emf and hence current
  9. It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.
  10. One of the solid structures in which the position of the atoms or ions are predetermined
  11. Defined as the flux density produced in it due to its own induced magnetism
  12. Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
  13. Which of the following is used by temporary magnets as the magnetic material?
  14. The uncharged particles which have no effect on its atomic charge.
  15. A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…
  16. The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force…
  17. Which of the following materials has permeability slightly less than that of free space?
  18. Which of the following is a paramagnetic material?
  19. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  20. Ohm's law cannot be applied to which material?
  21. Which of the following is a natural magnet?
  22. The core of a magnetic equipment uses a magnetic material with
  23. One coulomb of charge consists of ________ electrons.
  24. One oersted (Oe) is equivalent to _____ Gb/cm.
  25. What is used as the insulating material or dielectric in an electric ion
  26. One that has magnetic poles produced by internal atomic structure with no external current necessary
  27. Temporary magnets are commonly employed in
  28. The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given…
  29. A substance that attracts pieces iron
  30. The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium…