A wire carrying a 30.0 A current bends through a right angle. Consider two 2.00 mm segments of wire, each 4.00 cm as below. Find the magnitude of the magnetic field these two segments produce at point P, which is midway between them.  Find the direction of the magnetic field at point P  If you put an electron at Point P, what is going to happen?

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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.