A long, straight wire going through the origin is carrying a current of 4.90 A in the positive z-direction (see the figure below) At a point a distance r = 3.00 m from the origin on the positive x-axis, find the magnitude and direction of the magnetic field.   (a) magnitude of the magnetic field (in T) (b)direction of the magnetic field   At a point the same distance from the origin on the negative y-axis, find the magnitude and direction of the magnetic field.   (c)magnitude of the magnetic field (in T)   (d)direction of the magnetic field

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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.