Regarding Resonant Circuits

Danko

Joined Nov 22, 2017
2,168
At the specific frequency where XL = −XC, the imaginary components of the impedance exactly cancel each other out (equation
4 shows this most clearly). At this frequency the impedance of the circuit has its smallest magnitude and a phase angle of zero (remember only imaginary components can move phase angles away from zero). This is called the resonant frequency of the circuit, f0. It is always the frequency which causes XL and XC to cancel each other out.

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