# Lab 3 - Part B After we disconnected the power supply leads...

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Lab 3 Purpose: To study the phenomenon of charge storage, whose quantitative measure is known as capacitance. Observations Lab : Part A 9) When we picked up the pie plate we felt an opposing force, which we believe is static electricity. When the top pie plate is brought near the disk on top of the electroscope we saw the needle move. 10) We heard a spark jump from the pie plate to the styrofoam cup, after that we brought the pie plate black close to the electroscope but saw no change in the electroscope. 12) We saw and heard no spark when we touched the pie plate to the loose ground wire, it appears that the pie plate lost its charge, and that the transparency sheet holds more charge then the pie plate because the pie plate seamed to discharged whenever it got the chance, but could never discharge through the transparence.
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Unformatted text preview: Part B After we disconnected the power supply leads from the capacitor we saw that the voltage would drop at a fair rate if left alone. We took data until the data showed that at a certain point once the plates were farm enough apart the voltage would go down instead of plane out. Part C We found that the further the plates got from each other in this part the lower the capacitance got, and it eventually planed out around .052nF Conclusion: From parts A and B it’s very clear that something charge wants to lose its charge somehow and become neutral, and its clear that thing with opposite charges attract to each other. From part C we see that as the distance between 2 capacitor plates increases the capacitance goes down....
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