5.2.6: Questions

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1. Do the polarities of the sources in Figure 14.3.1 matter as to the resulting currents? Will the magnitudes of the currents be the same if one or both sources have an inverted polarity?

2. In both circuits of this exercise the negative terminals of the sources are connected to ground. Is this a requirement for mesh analysis? What would happen to the mesh currents if the positions of E1 and R1 in Figure 14.3.1 were swapped?

3. The circuits of Figures 14.3.1 and 14.3.2 had been analyzed previously in the Superposition Theorem and Nodal Analysis exercises. How do the results of this exercise compare to the earlier results? Should the resulting currents and voltages be identical? If not, what sort of things might affect the outcome?

4. In general, compare and contrast the application of Superposition, Mesh and Nodal Analyses to multisource DC circuits. What are the advantages and disadvantages of each? Are some circuits better approached with a particular technique? Will each technique enable any particular current or voltage to be found or are there limitations?