A long, straight wire lies on a horizontal table in thexy - plane and carries a current of 1.20 µA in the positivex - direction along the x - axis. A proton is traveling in the negativex - direction at speed 2.30 x 104 m/s a distance d abovethe wire (i.e., z = d ). (a) What is the direction of the magneticfield of the wire at the position of the proton? (b) Whatis the direction of the magnetic force acting on the proton?(c) Explain why the direction of the proton’s motion doesn’tchange. (d) Using Newton’s second law, find a symbolicexpression for d in terms of the acceleration of gravity g, theproton mass m, its speed v, charge q, and the current I.(e) Find the numeric answer for the distance d using theresults of part (d).

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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.