The figure above shows the cross-section of two concentric current loops w/ radii aa and 2a2a, where a=5.9cma=5.9cm. If the current in loop 1 is I1=7.8AI1=7.8A and the magnetic field at their common center is B⃗ =(−7.1μT)k^B→=(−7.1μT)k^ where k^k^ is directed out of the plane, what is the current (in amperes) in loop 2? Provide a positive numerical value if the current direction is counterclockwise, otherwise negative (if clockwise).

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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.