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Actually, all you've got to do to understand this is to realize that
energy is the time integral of power. (Remember that "useless" quantity of power as a time function?) When you integrate power to get energy, you get a constant. That constant is the energy present when power = 0, and it has to be evaluated by knowing something other than just the power. In a transmission line, that energy is stored in the electric and/or magnetic fields during the times energy isn't moving (i.e., when p(t) = 0). Really, math is cool. Roy Lewallen, W7EL W5DXP wrote: wrote: Are you saying that there can be power when the voltage or current is always 0? And that this is the error in the sequence of steps which makes Assertion A false? There can and does exist component energy when the NET power is zero. You will understand this when you understand complete destructive interference in light waves represented by the equation . . . |
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