S7_mud - Lecture S7 Muddiest Points General Comments A lot...

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Unformatted text preview: Lecture S7 Muddiest Points General Comments A lot of students were baffled by the idea of a Thevenin equivalent circuit. Please re-read the notes on this topic. Perhaps the easiest way to think about a Thevenin (or Norton) equivalent circuit is that it si a circuit model of a circuit, which models the behavior of the circuit at its terminals, but not in the individual elements. Responses to Muddiest-Part-of-the-Lecture Cards (38 cards) 1. General confusion about Thevenin equivalent circuits. (10 students) Comments ranged from the succinct, Huh?, to the more informative Whats the physical significance of Thevenin and Norton values? Several folks asked for more examples. There will be at least one on the problem set this week. Let me say again what I said in class: If you look into a resistive circuit at its terminals, the behavior will be pretty simple. In particular, you can describe the behavior by any two of three parameters: The Thevenin voltage (or open-circuit voltage); the Norton current (or short-circuit current); and the Thevenin (or Norton) resistance. On a plot of voltage versus current at the terminals, these three parameters correspond to the y-axis intercept, the x-axis intercept, and the slope of the straight line that describes the v versus i behavior of the circuit....
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S7_mud - Lecture S7 Muddiest Points General Comments A lot...

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