Consider a loop of circular wire of radius R located in the xy plane and carrying a stable current I, the center of the loop coincides with the origin of the coordinate system. Calculate the magnetic field at an axial point P at a distance z from the center of the loop, using cylindrical coordinates, and explicitly show that the component of the field B at P perpendicular to the z axis is zero. Indicate with p and k the unit vectors of the cylindrical coordinates. Note: you must solve the exercise in a vector way.

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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.