In the figure, a metal wire of mass m = 20.7 mg can slide with negligible friction on two horizontal parallel rails separated by distance d = 3.78 cm. The track lies in a vertical uniform magnetic field of magnitude 56.4 mT. At time t = 0 s, device G is connected to the rails, producing a constant current i = 9.21 mA in the wire and rails (even as the wire moves). At t = 78.4 ms, what are the wire's (a) speed and (b) direction of motion? (a) Number (b) to the left + i 0.74366 ook and Media Units B m/s m 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.