You have a long straight wire with 2 A of current running through it. a) Sketch a plot of the magnetic field strength B vs the perpendicular distance r from the wire from r1 = 1 m to r2 = 10 m. Appropriately label your axes and also specify the value of the points, (r1, B1) and (r2, B2). b) If an electron is at a perpendicular distance r = 1 m above the wire and also moving in a direction parallel to the wire but opposite the direction of the current at 99% the speed of light, what is the magnitude and direction of the force on the electron? (Draw your wire horizontally and your electron moving parallel at a distance r above the wire. Current in the wire runs from left to right.) c) If the electron is at r = 10 m, all else remaining the same as in part b, what is the magnitude and direction of the force on the electron?

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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.