A.  The upper semi-circular wire of radius ? is run by clockwise current ?. The lower semi-circular wire of radius ? is run by counterclockwise current 2?. Use Biot-Savart’s law to find an expression for the magnitude of the net magnetic field due to both wires at the center of the circle. Show all the work for deriving the magnetic field for one of the wires. B. Give, also, the direction of the net magnetic field at the center of the circle

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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.