Why do two parallel current-carrying conductors exert force on each other?
Why do two parallel current-carrying conductors exert force on each other?
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1 Answer
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This force is exerted by the magnetic fields produced by the parallel current-carrying conductors. If the currents run in the opposite directions, they repel and if they run in the same direction, then they attract. The force is exerted because each conductor lies in the magnetic field produced by the other. A force acts on the moving charges in each wire, according to the Lorentz force law. This concept is fundamental in understanding electromagnetic interactions in power transmission lines and circuits. It is not just theoretical, it defines the SI unit of current and the ampere.
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