Two circular coils are concentric and lie in the same plane. The inner coil contains 150 turns of wire, has a radius of 0.0095 m, and carries a current of 8.0 A. The outer coil contains 180 turns and has a radius of 0.018 m. What must be the magnitude of the current in the outer coil, such that the net magnetic field at the common center of the two coils is zero? Number i ! Units A

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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.