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# circuitslab4 - E245 L Experiment 4 October 11, 2007...

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E245 L Experiment 4 October 11, 2007 Experiment 4 Thevenin Equivalent Circuits

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Objective: The objective of this lab is to learn how to obtain a Thevenin Equivalent circuit by making measurements of the I-V (current-voltage) characteristics at a pair of terminals. This is done by building two technically arbitrary circuits and taking measurements of both the current and voltage characteristics at a pair of terminals. Specifically using 5 resistors a 500ohm, 1kohm, 1.5kohm, 2kohm, 2.5kohm; this is in addition to one variable resistor. The Thevenin equivalent resistance R Th can be determined from the equation: Diagrams:

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Calculations:

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Analysis of Results As can be seen from the data collected, the predicted values for the Thevenin circuit approximately matched the actual values of the Thevenin circuit that was built for both parts of the experiment. Given the two different circuits that were built, the open circuit voltages between terminals a and b were first determined. The short circuit currents between a and b were also obtained. After the i sc and the v oc were found, R th
could easily be calculated using Ohm’s law. In order to test if the calculated value for R
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## This note was uploaded on 04/02/2008 for the course E 245 taught by Professor Tang during the Spring '08 term at Stevens.

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circuitslab4 - E245 L Experiment 4 October 11, 2007...

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