Two long straight current-carrying wires run parallel to each other. The current in one of the wires is 4.1 A, their separation is 3.3 cm and they repel each other with a force per unit length of 2.9  10-4 N/m. (a) Determine the current in the other wire.   b) Determine what will happen if the direction of one current is reversed and tripled. (Select all that apply.) 1) The wires are attracted to each other. 2) The wires are repelled by each other.

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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.