Three parallel wires are placed on a horizontal table. The wires are each separated by 15 cm. The two wires on the left carry current away from you while the wire on the right carries current towards you. Going from left to right, the currents are 10 A, 20 A, 30 A. (a) Calculate the net magnetic field halfway between the 20 A and 30 A current-carrying wire. (b) What direction does this net magnetic field point?

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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.