A proton (q=1.6x10-19C, m = 1.67x10-7kg) is accelerated from rest through a voltage of 200V before it enters a region of uniform magnetic field perpendicular to the velocity of proton, as shown. a). If the proton in the magnetic field follows a circular pass with a radius 0.4 m, what is the magnitude of the strength of the magnetic field? b). Find the magnitude and direction (left, right, up the page, down the page, into the page, out of the page) of the required electric field that would allow this proton to pass through the magnetic field undeflected.

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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.