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Is it possible to have magnetic field in a conductor which don't have electric current?If yes what will be the magnitude |
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Answer» Answer: The Hall effect is the phenomenon in which a voltage difference (called the Hall voltage) is produced across an electrical conductor, transverse to the conductor’s electric current when a magnetic field perpendicular to the conductor’s current is applied. When a magnetic field is present that is not PARALLEL to the motion of moving CHARGES within a conductor, the charges experience the Lorentz force. In the absence of such a field, the charges follow a roughly straight path, occasionally colliding with impurities. In the presence of a magnetic field with a perpendicular COMPONENT, the PATHS charges take becomes curved such that they accumulate on one face of the material. On the other face, there is an excess of opposite charge remaining. Thus, an electric potential is created so long as the charge flows. This opposes the magnetic force, eventually to the point of cancelation, resulting in electron flow in a straight path. |
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