FAU Physics Lab II - Exp. 3 - FAU Physics Lab II PHY2049L...

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FAU Physics Lab IIPHY2049LLab Report - Experiment #3Physics Department - Florida Atlantic University – Spring 2015Lab Instructor: [email protected]
PHY2049L Laboratory Report Experiment #3INTRODUCTION:In the interest of saving paper, ink and my miniscule college-student budget, I didn’t copy and paste the introduction from Experiment 2 into Experiment 3 because they are identical in theory and background. The purpose of Experiment 3 is to further explore the fundamental principles of how resistors work, but this time, illustrating the concepts with light bulbs in both parallel and series connections. THE MODEL: Series-Parallel Circuits A series-parallel circuit is simply a combination of the series and parallel circuits. The rules used to analyze the series and parallel circuits separately will be employed to determine the behavior of the series-parallel circuit. Fig 3 shows a schematic of this type of circuit even though our circuit built in this experiment had only one parallel making the current formula actually (I1=(I2+I3)=I4) and the R placements were different. Fig 3. To determine V, I, & R, our first step will be to determine Rparrellel: ࠵?࠵?࠵?࠵?࠵?࠵?࠵?࠵?࠵?࠵?=࠵?࠵?࠵?࠵?࠵?࠵?!࠵?࠵?Then to find theΣR = ࠵?࠵?+࠵?࠵?࠵?࠵?࠵?࠵?!࠵?࠵?+࠵?࠵?. This gives us our resistance values required to use in Ohm’s Law to find ࠵?࠵?through࠵?࠵?and ࠵?࠵?through࠵?࠵?. Table 1: Measured Resistances R1 ΩR2 ΩR3 ΩR4 Ω104.63 53.91 104.26 185.87
Measurement #1: Use a Voltmeter and Ammeter to measure DC Voltage and Current in Fig.1 Questions on Measurement #1:

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