Please feel free to stop at my office if you have questions before the exam. I will be in my office during our lab times on Sept. 20 and 25, as well as many other times.
Problem 3.50: Solve the problem first using the node-voltage method and find Ix. Then use source-superposition and answer parts (a)-(f).Note that you are asked to solve each problem twice, using two different methods. This will give you a chance to check your work and also get more practice with node-voltage, mesh-current, Thevenin equivalent circuit, and other analysis methods.
Problems 3.51, 3.52, 3.53, and 3.54: Use both "Method 1" and "Method 2" to find the Thevenin equivalent circuit in each of these problems, and show all of the steps in your analysis. Then use your equivalent circuit to answer the questions in Problems 3.53(b) and 3.54. Think about how much more difficult it would be to answer Problem 3.53(b) without the Thevenin equivalent circuit!
Further note, added on Sept. 24:
For finding Thevenin equivalent circuit models, Method 1 is the "Open-Circuit/Short-Circuit
Method," Method 2 is the "Equivalent-Resistance Method," and Method 3 is the "External-Source Method."
The methods are defined on the slides attached here,
which are also on
Moodle.
I am sorry if this terminology caused confusion - I just realized that the methods
are not numbered 1, 2, 3 in the text!
Please clearly show all of the steps used in your analysis. Include circuits that are labeled with the voltages and currents used in your solution. (Recall that a voltage is fully defined when its polarity is indicated, and a current is fully defined when its direction is indicated.) If you get a result using your calculator, clearly show the equations that were solved on your calculator.