A thin 50 cm (0.5 m) long metal bar with mass 0.75 kg rests on (but is not attached to) two metallic supports in a uniform 0.45 T magnetic field as shown in the figure. A battery and a 25 Ω resistor in series are connected to the supports. Find the highest voltage the battery can have wihtout breaking the circuit and the initial acceleration of the bar if the resistor decreased resistance to 2 ohms.

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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.