A transmission line strung 5 m above the ground carries a current of 400 A. What is the magnetic field on the ground directly below the wire? Hint Review Section 12.2 Magnetic Field Due to a Thin Straight Wire, where a formula for magnetic field due to a current in a long, thin, straight wire is derived. Watch the units and powers of 10. Magnetic field due to the transmission line is 1.6E-6 x mT. For comparison, the geomagnetic field is around 0.05 mT (varies by latitude). Does the transmission line significantly affect the magnetic field in the area near it?

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Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.