A conducting bar is sliding to the right on two rails which are connect by a 15  resistor. The distance between the rails is L = 0.50 m. There is a uniform magnetic field with a magnitude of 0.80 T as shown in the figure.  (a) Find the speed at which the bar must be moved to produce a current of 0.2 A in the resistor.  Ignore the resistance in the rails and conducting bar. (b) What is the direction of the induced magnetic field and induced current in the system? Explain reasoning. HTML EditorKeyboard Shortcuts

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A: Given- Power P=64 W The constant speed of the rod is v=8 m/s

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A: GIVEN: Force Fapp =1.35N Resistance R = 8Ω speed of bar =1.85m/s

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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.