The wire in the drawing carries a current of 13 A. Suppose that a second long, straight wire is placed right next to this wire. The current in the second wire is 36 A. Use Ampere's law to find the magnitude of the magnetic field at a distance of r = 0.80 m from the wires when the currents are (a) in the same direction and (b) in opposite directions. Circular path

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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.