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Unformatted text preview: Title: Lab1 DC Circuits Richard Madison Haynie Partner: Murdock Hart (All graphs are attached to back) Objective: Learn how to use a breadboard to build circuits and analyze them along with learning how a meter can affect readings. Along with this observe plots of I vs. V for resistors, light bulb, and a diode then compare results with Ohms Law. Last build a voltage divider measuring certain values and using the data to build a Thevenin circuit then confirm that V L from Thevenin circuit is equivalent to V L from the original circuit. 20k and 10k Resistors: The circuit shown in figure 1 was set up. With this circuit several currents were measured with variable voltage. The results are shown in table 1. Table1 Voltage 3.01V 5.93V 9.03V 12.17V 14.59V Current .16mA .30mA .46mA .61mA .73mA Current (Calculated) I=V/R .15mA .30mA .45mA .61mA .73mA The measured results and the calculations from theory are equivalent and it is concluded that this resistor is Ohmic. The data I vs. V is plotted in graph 1 and can be seen that the plot is linear. Replacing the 20k resistor in the circuit with a 10k resistor and repeating the results are shown in table2. Table2 Voltage 3.19V 5.97V 8.89V 11.88V 14.59V Current .32mA .60mA .90mA 1.20mA 1.47mA Current (Calculated) I=V/R .32mA .60mA .89mA 1.19mA 1.46mA Once again measured results and the calculations from theory are equivalent and it is concluded that this resistor is Ohmic. The data I vs. V is plotted in graph 2 and can be seen that the plot is linear. These results should be expected and it can be seen from Ohms Law I=V/R why the linear....
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 Spring '08
 Tsong

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