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# hw5 - V d = R d R c R d V in(b If V out = 0 then what must...

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Homework 5 Due: Friday, September 2 1 In the circuit of Figure 1, suppose V 2 = 45 V . Find the voltage produced by the source V s , the current flowing out of the positive terminal of the source I s , and the power delivered by the source. Figure 1: Model circuit for Problem 1. 2 Consider a series voltage divider circuit whose total resistance is 1600 Ω as illustrated in Figure 2. Suppose that V 1 = 0 . 75 V s and V 2 = 0 . 25 V s , and find the values of R 1 , R 2 and R s . 1

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Figure 2: Model circuit for Problem 2 3 Figure 3 shows a Wheatstone bridge circuit that is commonly used in a variety of measurement equipment. the bridge circuit is said to be balanced if R a R d = R b R c . In this case, the voltage V out = 0 for any input voltage V in . (a) Use voltage division to compute the voltages V b and V d . Show that
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Unformatted text preview: V d = R d R c + R d V in (b) If V out = 0, then what must be true about V b and V a ? Show that V out = 0 if and only if R a R d = R b R c . (c) Suppose that R a R d = R b R c and a 3 . 5 Ω resistor is connected across the V out terminals. Find the current through the 3 . 5 Ω resistor. (d) Suppose V in = 24 V, R a = 3 Ω, R b = 6 Ω, R c = 2 Ω, and R d = 2 Ω. Find V out . 2 Figure 3: Wheatstone bridge circuit. 4 In the circuit of Figure 4, it is required that I 1 = 0 . 5 I in . Find the resistance R (in Ω), the equivalent conductance G eq , the current I 2 in terms of I in , and the voltage V in in terms of I in . Figure 4: Model circuit for Problem 4. 3...
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