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yogi
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We will imagine a core ring of magnetic material (hi mu) encompassing the earth. At one station, we wrap a couple of loops of wire to form the primary winding of a transformer - say in Los Angeles. At another part of the earth, say Paris, we wrap a few turns to form a secondary winding - our thought experiment assumes no leakage inductance and no stray capacitance. Now energize the primary winding with an AC sin wave and measure the phase of the secondary - we know the divergence of the magnetic field is zero - and consequently the lines are continuous - therefore the magnetic lines should not be of greater strength near the source - neither near the North or South pole of the primary winding - nor should the density of the field vary along the circumference of the ring at any given instant
If the secondary and primary voltages are in phase, the signal is coupled at greater than c. If the phase of the secondary lags the primary, then the magnetic field lines are not continuous and the divergence is not zero which conflicts with our assumption re closed loop character of magnetic flux lines.
If the secondary and primary voltages are in phase, the signal is coupled at greater than c. If the phase of the secondary lags the primary, then the magnetic field lines are not continuous and the divergence is not zero which conflicts with our assumption re closed loop character of magnetic flux lines.
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