Two concentric, circular wire loops of radius r, = 0.757 m and r2 = 0.365 m are made out of resistive wire and carry currents in opposite directions, with currents of I, = 6.369 A and I2 = 2.908 A. Calculate the magnitude of the net magnetic field, in Teslas, at the center of the arrangement. A positive answer indicates a magnetic field out of the page; a negative answer indicates a magnetic field into the page. Concentric Wire Loops.PNG 12

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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.