Need help for electromagnetic theory question:   E(r) [electric field] inside a spherical shell of radius R that carries uniform surface charge density is zero. Make an arguement based on pairing off elements of the charge distribution that confirms this result for r (vector) = 0 (the center of shell). PLEASE do include a sketch of the arguement showing that every arrow representing electric field on the shell is an equal-length arrow and how these pairs cancel each other out when added, resulting in a net electric field of zero

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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.