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lesson08 - Lesson 8 Node Voltage Analysis(Section 3-1(CLO...

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V S V A V C V B R 1 R 2 R 3 I I S V I + _ I X Lesson 8 – Node Voltage Analysis (Section 3-1)(CLO 3-1) One of the basic understandings that will help students write node voltage equations is to recognize that this technique is nothing more than applying KCL. The first thing to ask the students to do is to count and label the nodes, and then to select one of the nodes as the reference node or ground. Although any node can be selected as a ground, if they choose wisely they can simplify the analysis. Ask them to look for voltage sources. If one or more share a common node, that node makes a good reference candidate. Encourage them to select the negative terminal of a voltage source as their reference. That will automatically make the positive node equal to the voltage of the source – that is one less node they have to worry about. The node labels are ‘ground symbol (0V)’ and V A , V B …V N . Some of the node voltages may be known since they are connected to a source whose other end is connected to ground – e.g.
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