Magnetic force exerts work when a particle is displaced in a magnetic field. The statement is     always true     sometimes true     cannot be determined     never true   The magnetic force is zero when the angle between the velocity and the magnetic field is ___.     0 degrees     90 degrees     180 degrees     more than one of the choices

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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.