Physics > Lab Report > Northeastern UniversityPHYS 1152Report for Experiment 18 R-C Circuits (All)

Northeastern UniversityPHYS 1152Report for Experiment 18 R-C Circuits

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Report for Experiment #18 R-C Circuits Jingyi Yu Lab Partner: Qianqian Zhang TA: Chi Zhang, Kaihua Ji Nov. 13, 2015Abstract We’ve learned about circuits with resistors and with capacitors sepa ... rately in previous lectures, and both of the cases have relatively simple and straightforward features. However, things get a little bit different and difficult to explain when we have both capacitor and resistor connected in the circuit. We can’t simply apply the formulas for resistors or capacitors, and in this case those values which used to hold constant start to change as time goes by. Introduction In this experiment, we want to explore the RC circuits based on the formulas and properties we learned, and check if they are true. Our main focus is basically on the relationship between the voltages across resistor and capacitor as time changes as we charge a capacitor; how does current in a series circuit change as time changes as wedischarge a capacitor; and how does the voltage across the resistor change as time changes when we connect two capacitors in series and in parallel. To be specific, in Investigation1, we measured the voltage across the capacitor [VC ] and the resistor [VR] every ten seconds for five minutes, plotted them and try to get the measured time constant []. Then compare the measured time constant with calculated time constant. [Show More]

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