Homework 5 Due Friday September 2 1 In the circuit of Figure 1 suppose V2 45V Find the voltage produced by the source Vs the current flowing out of the positive terminal of the source Is 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 as illustrated in Figure 2 Suppose that V1 0 75 Vs and V2 0 25 Vs and find the values of R1 R2 and Rs 1 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 Ra Rd Rb Rc In this case the voltage Vout 0 for any input voltage Vin a Use voltage division to compute the voltages Vb and Vd Show that Vd Rd Vin Rc Rd b If Vout 0 then what must be true about Vb and Vd Show that Vout 0 if and only if Ra Rd Rb Rc c Suppose that Ra Rd Rb Rc and a 3 5 resistor is connected across the Vout terminals Find the current through the 3 5 resistor d Suppose Vin 24 V Ra 3 Rb 6 Rc 2 and Rd 2 Find Vout 2 Figure 3 Wheatstone bridge circuit 4 In the circuit of Figure 4 it is required that I1 0 5 Iin Find the resistance R in the equivalent conductance Geq the current I2 in terms of Iin and the voltage Vin in terms of Iin Figure 4 Model circuit for Problem 4 3
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