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Cecil Moore wrote:
John Popelish wrote: Cecil Moore wrote: What does it mean to the E-fields and H-fields to say the voltage is leading the current? It means that the current at both ends of the coil was delayed (relative to its phase if the coil had not been there). It means that there was a voltage difference across the ends of the coil that drove that current through the coil. In order to avoid any delay through the coil, you propose a delay in the one inch of wire at the bottom of the coil? Does that really make sense to you? How is this magic delay accomplished? Exactly the way it is accomplished if you apply AC to an LC "L" low pass filter that droves a resistor load. The short antenna acts as the capacitor (in parallel with losses and radiation) in the circuit. It is resonated with the series inductor so both the inductance and capacitance cancel, so the source drives only the losses and radiation. Power factor corrected. If you don't believe me, simulate it with EZNEC. Connect a source to a parallel combination of C and R. Record the phase of the current with respect to the voltage (the current will lead). Then add a series inductance that cancels the capacitance, and the current will be delayed till it matches the phase of the applied voltage. Power factor corrected. |
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