Which of the following activities would lead to the creation of magnetic fields?    select all that are correct a.Placing a negative ion in an environment where it has zero acceleration and a zero velocity b.Placing a proton in an environment where it has a nonzero acceleration that is constantly changing c.Placing a negative ion in an environment where it is moving at 84m/s in a straight line d.Placing a positive ion in an environment where it has zero acceleration and a nonzero velocity e.Placing an electron in an environment where it is completely at rest

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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.