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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 Ohm’s 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 Ω and 10k Ω 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. Table-1 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 Ω resistor in the circuit with a 10k Ω resistor and repeating the results are shown in table-2. Table-2 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 Ohm’s Law I=V/R why the linear....
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- Spring '08
- Voltage divider, Resistor, Electrical resistance, Electrical impedance