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Report for Experiment DC Circuits

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Report for Experiment #17 DC Circuits Jingyi Yu Lab Partner: Qianqian ZhangTA: Chi Zhang, Kaihua Ji Oct. 30, 2015 Abstract DC circuit is one of the most common types of electric circuits that is ... used in our daily lives. The circuit in a flashlight, for example, is a simple DC circuit which consists of one of two batteries, some resistors maybe, and a light bulb. We’ve learned that the essential physics quantities about electric circuits contain current, voltage, resistance, and power; and that there are two basic types of circuits, series circuits and parallel circuits. So what’s the relationship between these variables andare those relationships different when put in to different types of circuits? Let’s figure it out in the following experiment. Introduction In this experiment, we want to explore the basic features of DC circuits, and their properties in different circumstances. We will use ammeter, voltmeter, and ohmmeter as our main tools to measure the values of current, voltage, and resistance, then calculate unknown variables and see whether the results agree with the theories we learned before. To be specific, in Investigation1, we measured the electromotive force (emf) for both of our batteries, the total voltage when connect the two batteries in series and in parallel, and compared the measured voltages for both trials with the expected value calculated by the equation given [Show More]

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