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Unformatted text preview: to zero, and determine the resistance looking into the terminals. A voltage source of zero strength is a short circuit, so the result is that the two 5 Ω resistors are in series, forming an equivalent 10 Ω . This is in turn in parallel with the 10 Ω resistor. The equivalent resistance of two 10 Ω resistors in parallel is 5 Ω . Thus, R T = 5 Ω The correct answer is therefore number 6. The class did much better on the second try....
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 Fall '05
 MarkDrela
 Thevenin equivalent, Thévenin's theorem, Series and parallel circuits

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