Two very long, parallel wires are separated by a distance of 2 m. The top wire carries a current of 16 A flowing to the left. Point x lies between the wires, 0.4 m below the top wire (see figure below). (a) What is the strength of the magnetic field at point x due to the top wire? For part (a) and (b) you may assume no current is flowing in the bottom wire. (b) What is the direction of the magnetic field at point x due current flowing in the top wire? (Give your answer in terms of toward the top, bottom, left side, right side, into, or out of the page.) (c) What current must flow through the bottom wire to have the net (total) magnetic field be zero at point x? Specify both the magnitude and the direction of the current.

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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.