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PHYS 212 RECITATION EXERCISE 1: USING PHASORS FOR A DRIVEN RC CIRCUIT We will consider a circuit consisting of a time varying emf in series with a capacitor and resistor. The capacitance and resistance are fixed but we can tune the frequency of the source. In an AC circuit, each element has a reactance which can be used to relate the peak current through the element to the peak voltage across the element 1. What does the angular frequency of the emf have to be for the capacitor and resistor have the same peak voltage (i.e. for R and X to be the same)? .Phasors can be used to represent the different parameters for an AC circuit At the angular frequency found in Q1, the phasor diagram (for a general time) is shown in case (i) in the figure below The instantaneous values of the voltages and currents are the horizontal components of each phasor The lengths of the phasors are the maximum value each parameter can have (the length of the current compared to the other phasors is arbitrary) The peak emf is the hypotenuse of a triangle formed with the peak voltage for the resistor and capacitor Your answers to Q2-3 can be placed directly in the table below RXc2
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Soluhiom R 2X = 26.56 uC @ w-R、Ve, m-Va, m k-ん 2N 63.44。 4Changn co Dishanging

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