Wednesday, March 16, 2011

Lab 4 - Nodal Analysis

In this lab we investigated the procedures of nodal analysis by using them to analyze more complex circuits.  Since these procedures are an invaluable tool for analyzing circuits which contain multiple power supplies and multiple loads, we created a complex circuit in order to evaluate them.  The idea was to construct a circuit with more than one power supply so that we ensure a reliable power source.  The circuit constructed contained two voltage sources(12.2V, 9.12V), two loads(994|994ohm), and 3 cable resistances(98.5|218|220ohm).  We were able to calculate theoretical values for the current coming from the power supplies and the voltages across the loads and then compare these to our measured results.  We found that the percent error between these was less than +/-2% in all cases which validates the node method. 

VariableTheoreticalMeasured% Error
I bat10.01750.01732-1.02
I bat20.00150.00151-0.667
V210.2510.41.46
V38.678.81.5

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