ELEC 225, Fall 2009
Prof. Rich Kozick

Homework 7B Answers

Please be sure to clearly show your work in the solutions that you submit. Your approach is much more important than obtaining the correct numerical answer.

Problem 4.64: V_th = 52 V , R_th = 6 ohms

Problem 4.68: V_th = 30 V , R_th = 20 ohms

Problem 4.71: V_th = -86.40 V , R_th = 43.2 Kohms

Problem 4.75: You can check this one using the given values of v_L and R_L.

Problem 4.78: R_th = 20 ohms, and V_th is obtained with no calculations (but explain your reasoning for the value you state in your solution!).

Problem 4.79: Two answers for R_o: 16.67 ohms and 150 ohms.

Problem 4.88: (a) 0.9 ohms, (b) 2250 W, (c) 80.54%.

Problem 4.90: Think about this yourself (listing the answer here will take away the fun!).

Problem 4.94: v_o =28 V.

Problem 4.95: v_o =-136 V, i_o = 2 A.