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# 398b - — — An RU Cil'CLlit contains 3 f‘ESiStﬂf‘...

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Unformatted text preview: —+— . An RU: Cil'CLlit contains 3. f‘ESiStﬂf‘, Eif'l if'IUﬂCCCIIf‘, and El capacitor in SEFiES ECI'CISS an ac generator. Ely Rirchhoff’s rules we icnovv that at all times the sum of the respective voltage drops across the resistor, inductor, and capacitor is equal and opposite to the alternating voltage provided by the generator. VR=IR VC=IXC “:33: The voltage across the resistor is in phase with the current. The voltage across the inductor is 90" ahead of the current, and the voltage across the capacitor voltage is 90° behind of the current. I The combined effect of the resistor, inductor, and capacitor to oppose current ilovv is called the impedance. Because both capacitive and inductive reactance is frequency dependent, impedance is also frequency dependent. Because the voltage drops across the capacitor and inductor are always of opposite polarity,13ﬂ° out of phase, the capacitive and inductive reactances tend to cancel each other out. At the frequency vvhere capacitive and inductive re- actances are equal, the circuit is operating at the resonance frequency, and the voltage and current are in phase (:1: = ﬂ]. AC CURRENT ISATCIPIC TI'I.A.T NEEDSTCI BE TAKEN STEP E‘f STER MAKE SURE 'i'CIU HA'II'E A CCINCREI'E UNDERSTANDING OF THE FUREL‘i" RESISTWE, PUREL‘I' CAMCITWE AND PUREL‘I’ lHDUCTI‘ifE CIRCUITS BEFORE TRYING TD TACKLE THE RLC CIRCUIT. c zoos .J arrest ...
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