Two very long, parallel wires are separated by d = 0.015 m. The first wire carries a current of I1 = 0.35 A. The second wire carries a current of I2 = 0.45 A. A) Express the magnitude of the force between the wires per unit length, f, in terms of I1, I2, and d. B) Calculate the numerical value of f in N/m. C) Is the force repulsive or attractive? D) Express the minimal work per unit length needed to separate the two wires from d to 2d. E) Calculate the numerical value of w in J/m.

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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.