A horizontal compass is placed 0.9cmdue South from a straight vertical wire carrying a 15.5A current in the direction shown in the figure above. The horizontal component of the earth's magnetic field at this location is Be=4.5×10−5T and points North. In which direction does the compass needle point? Give the angle between East and the compass needle in degrees. Also what is the magnitude of the B-field at the position of the compass? Please times your final answer by 104, in units of T.

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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.