28. Which of the following does not characterize a magnetic force on a moving charge? a. The magnitude of the magnetic force is proportional to the magnitude of the magnetic field. b. Magnetic force and the magnetic field have similar directions. c. The magnitude of the magnetic force is proportional to the magnitude of the charge. d. The magnetic force is affected by the charged particle's velocity. 29. Which of the following is affected by the magnetic force on a moving charged particle? a. the direction of the particle's motion b. the speed of the particle c. the acceleration of the particle d. the kinetic energy of the particle 30. In which orientation of the particle's velocity relative to the magnetic field can we yield the minimal magnetic force? a. Parallel c. Tangential d. Circular b. Perpendicular

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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.