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Friday, February 18, 2011

State clearly the Thevenin’s theorem and explain its usefulness in linear network analysis.

State clearly the Thevenin’s  theorem and explain its usefulness in
linear network analysis.

This theorem is one of the most useful network theorems and states that the current in any load impedance, connected to two terminals of a network of impedance and generators is the same as if this load impedance were connected to a constant voltage generator whose terminal voltage is the open circuited voltage at the two terminals and whose internal impedance is the impedance of the network looking back into the terminals with all the generators replaced by their interval impedance's.

This theorem is most useful when it is desired to know the effect on the response in a network or varying part of the network while keeping some other part constant.

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