a) A steady current of I flows in the same direction around each coil of the Helmholtz coils shown in the figure. Write with its reasons how the magnitude of the magnetic field at the center of the Helmholtz coils depends on the number of turns of the coils N and the current I. (directly or inversely proportional).  b) A steady current of I flows in the opposite direction around each coil of the Helmholtz coils shown in the figure. Give information about the  magnitude of the magnetic field at the center of the Helmholtz coils with its reason. c) What is the main differences between electric fields and

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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.