12. Three identical wires carry equal current of 4.0 A that is coming out of the plane of the page. A fourth identical wire, labeled P, carries current 4.0A that is going into the page. The four wires are located at four corners of a square as shown in the figure. What is the direction of the net magnetic force acting on the wire labeled P. 4A a) To the left b) To the right c) Up the plane of the page d) Down the plane of the page e) There is no force

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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.