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Network Theorems - I ENTC 210: Circuit Analysis I Rohit Singhal Lecturer Texas A&M University

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The Theorems Superposition Theorem Thevenin’s Theorem Norton’s Theorem

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Superposition Theorem When there are multiple sources! The current through, or voltage across, an element in a linear network is equal to the algebraic sum of the currents or voltages produced independently by each source.

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Superposition Theorem

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Number of Networks Analyzed = Number of independent Sources

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Thevenin’s Theorem Any two terminal, linear dc network can be replaced by an equivalent circuit consisting of a voltage source and a series resistor.

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Thevenin’s Theorem

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Steps First remove the portion of the network, whose equivalent has to be found Mark the terminals of the remaining 2 terminal network

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Thevenin’s Theorem Steps to calculate R th Calculate R th by setting all sources to zero, and using reduction techniques. Steps to calculate E th Return all sources to their original position and find the open terminal potential.

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