Series RLC Circuit Applet Open the Series RLC Circuit applet. 1. Check the phasor diagram checkbox. 2. Check all the voltage checkboxes: VR , VL , VC , V, I. Note: if you click the checkboxes twice the graphs will be in color. 3. Animate the applet by clicking on the double arrow below the t axis. 4. Play with the applet. Suggested Applet Exercise Set the applet to show you all four voltages and the current I. Set L = 500 mH, C = 100 µF, R = 250 ohms. Compute the resonant frequency of the system. Move ω to the resonant frequency, watch the phasors and the sinusoidal plots as you do this. With ω set at ω0 watch the amplitudes of the three output voltages and the output current as R increases. Explain everything you see in terms of the complex Ohm’s laws and the Exponential Response formula solution for �i. In the phasor diagram, can you see that the voltages across R and L are 90◦ out of phase? What about R and C? Are the voltages across C and L 180◦ out of phase? Why does the the angle between the input voltage and the output voltages vary as you vary ω?

Series RLC Circuit Applet

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