The metal bar shown in the figure can move without friction on two rails with a distance of d = 4 m. The uniformly distributed magnetic field between the rails is B = 2 T and the rails are connected to each other by three resistors R1, R2 and R3 shown in the figure. The bar is pulled to the right with a constant velocity v. Since the magnitudes given in the figure are B = 2 T, v= 3 m/s, L = 6 m, d = 4 m, R1 = 1 ohm, R2 = 3 ohm, and R3 = 5 ohm, we can determine the magnitude and direction of the current passing through R3. find it.

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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.