5. An electron of mass m and charge -e moves at a constant speed v along a circular path of radius r in a region of magnetic field B. In the same region, particle X with mass M moves at a constant speed 3v along a circular path with radius 2r. The direction of revolution of the particles is indicated in the figure. What is magnitude and sign of the charge of particle X? ans. q 3 M =11e 2 m Electron 2r Particle X B

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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.