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The drawing shows a coaxial transmission line made of a small cylindrical conductor enclosed in a larger cylindrical conductor. The two conductors are connected to a circuit consisting of a voltage source, V sub g with an internal resistor R sub g, and a load resistor R sub L. The smaller conductor is connected to the positive terminal of the source while the bigger conductor connects to the negative terminal. A magnetic field, H is induced in a circular formation in the dielectric medium between the two conductors, while an electric field E is induced perpendicular to the magnetic field. The two fields together constitute an electromagnetic field.