Resonant Frequency
Field: Power switch
China
In a series circuit, the resonant frequency condition occurs when the inductive reactance equals the capacitive reactance. Changing the supply frequency alters the values of XL = 2πfL and XC = 1/2πfC.As the frequency increases, XL rises while XC falls. Conversely, a decrease in frequency causes XL to drop and XC to rise.To achieve series resonance, the frequency is tuned to fr (point P in the curve below), where XL = XC.
At series resonance, when XL = XC
Where fr denotes the resonant frequency in hertz, with inductance L measured in henries and capacitance C in farads.
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