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The impedance of an inductor is Zl = 2*pi*F*L; a cap is Zc = 1/(2*pi*F*C). The impedances are equal at resonance.
The Q of the resonance is determined by the resistances in series/parallel with the LC, depending on the circuit.
A series L-C is at its lowest impedance at resonance, theoretically zero with perfect parts. A parallel L-C is at its highest impedance at resonance, that being theoretically infinity. The imperfections make these not be truly zero or infinity. The external resistances working with the L-C, and especially the coil resistance, limit the sharpness of the Q and the size of the resonant impedance.
And the ratios of the external impedances to the actual impedances of the L-C determine the attenuation/peak response.
See: LC Circuit Resonance effect
The Q of the resonance is determined by the resistances in series/parallel with the LC, depending on the circuit.
A series L-C is at its lowest impedance at resonance, theoretically zero with perfect parts. A parallel L-C is at its highest impedance at resonance, that being theoretically infinity. The imperfections make these not be truly zero or infinity. The external resistances working with the L-C, and especially the coil resistance, limit the sharpness of the Q and the size of the resonant impedance.
And the ratios of the external impedances to the actual impedances of the L-C determine the attenuation/peak response.
See: LC Circuit Resonance effect
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