A loop of wire with a current is in uniform magnetic fields. In one situation the wire is halfway in the field. In another, the wire is between two magnets whose fields are pointing in opposite directions.  Which of these will have a net force? Which would have a net torque? Which direction will each loop spin and/or move, assuming it starts at rest? Explain your reasoning for your answers.

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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.