The straight wire will be our source and it creates a magnetic field that exerts a net force on each loop. (a) Draw a diagram showing the direction of the magnetic field at and the forces on each segment of each loop. (b) Rank the loops according to the magnitude of the net force exerted on each loop, greatest first. Explain your answer. (c) Find an expression (in terms of i, iL, L and D) for the net force exerted by the straight current i on loop a (square, sides length 2L) and determine its direction.

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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.