Monday, April 28, 2014

Day 15 - Capacitors







Our group performed an experiment in which we were to verify the relationship between distance and capacitance. We used an old physics textbook with varying degrees of separation based on the number of pages, as well as two sheets of aluminum. We used distances of 1, 10 and 20 pages of separation within the textbook. We obtained our capacitance values and graphed them, and found their to be an inversely proportional relationship between the distance and capacitance. As the distance increased, the capacitance decreased significantly. Our kappa value that was based on the first trial was .367, slightly off by a factor of 10 from the theoretical value of 3.5 for paper.











Later for the class experiment we were presented with two capacitors in which to measure the capacitance of. We found them to have 1.088 and 1.165 micro farads, respectively. We then proceeded to set them up in series and in parallel in order to measure the resulting capacitance values. By doing this we were able to verify the theoretical knowledge that we have been taught in class; that when capacitors are in parallel their capacitance values are simply added, and when they are in series their equivalent capacitance value is found in the same way that equivalent resistance of a parallel resistor is found, with the equation shown below.


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