A long straight wire is oriented left-right on the surface of the page as shown. It has an unknown current through it that produces a magnetic field. You measure the magnetic field at a location d= 1.6 cm above the wire and find it to be 28 uT pointing into the page. What is the magnitude of the current flowing through the wire? What is the direction of the current in the wire? ( state the direction as up, down, left, right, into or out of the page)

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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.