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Serial Resonance facts?

Discussion in 'Beginner Electronics' started by Overlord, Aug 21, 2003.

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  1. Overlord

    Overlord Guest

    How goes it all?
    Well, I'm studying up on electronics and had some questions.
    I have the parallel resonance circuits down; that's easy.
    At resonance each branch pumps out it's current 90° out of phase.
    When they combine in the main line the currents are actually 180° out
    of phase and cancel each other out .
    f= 1/2pi²LC (damn... newsreader won't take a pi sign or a square
    root sign..... 'nother giant step backwards....)

    Anyway.... that's pretty straight forward to me.
    My problem is the serial resonant circuit.
    When Xl = Xc, basically the combination of the 2 causes the reactance
    of both, and consequently the impedance to vanish.
    Why? Can someone lay it out for me?
    Thanks....
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