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10-6-11 Nodal and Mesh Analysis

Question 2 why would this circuit be more difficult

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Question 2. Why would this circuit be more difficult to analyze if using mesh analysis? This circuit would have been more difficult to analyze with mesh analysis because of the simple fact that it has more loops than nodes. Instead of 3 equations with nodal analysis, mesh analysis would have yielded 5 equations, and called for the solving of 5 variables. II. Mesh Analysis
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In this section of the lab, we performed mesh analysis to find the voltages at the points A , B , C , and D shown in Figure 2. Other than these differences, this portion is very similar to part I. Figure 2. The circuit given for part II, with the Multisim probes shown; note the direction of each. Table 5. The Mutisim voltages for this procedure Point Multisim Voltage () Measured Voltage () Percent Difference A 2.35 2.41 2.49% B -0.07 -0.05 40.0% C 1.64 1.67 1.80% D 1.24 1.27 2.36% Table 6. The Mutisim currents for this procedure Around Loop Multisim Current () Measured Current () Percent Difference 1 0.265 0.258 2.71% 2 0.253 0.247 2.43% 3 0.131 0.134 2.24% Much like in part I, we calculated the currents of each loop by hand, using Kirchhoff’s Voltage Law. Again, knowing the values of the voltage sources and resistors, we can simplify these equations to the following:
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With these results, we can progress through the circuit, calculating the voltage drops across each resistor, and find the voltages at the required points. Table 7. The calculated voltages for this procedure Point Calculated Voltage () Measured Voltage () Percent Difference A 2.35 2.41 2.49% B -0.09 -0.05 80.0% C 1.64 1.67 1.80% D 1.24 1.27 2.36% Table 8. The calculated currents for this procedure Around Loop Calculated Current () Measured Current () Percent Difference 1 0.265 0.258 2.71% 2 0.254 0.247 2.83% 3 0.132 0.134 1.49% Question 3. How much power did the whole circuit consume? Demonstrate how you calculated it.
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