4.61 a) Find the current in the 10Ω resistor in the circuit in Fig. P4.61 by making a succession of
appropriate source transformations.
b) Using the result obtained in (a), work back through the circuit to find the power developed by
the 100 V source.
[a]
[b]
4.65 a) Find the Thévenin equivalent with respect to the terminals a,b for the circuit in Fig. P4.65 by
finding the open-circuit voltage and the short-circuit current.
b) Solve for the Thévenin resistance by removing the independent sources. Compare your result to
the Thévenin resistance found in (a).
4.66 Find the Norton equivalent with respect to the terminals a,b for the circuit in Fig. P4.66.
4.74 Determine the Thévenin equivalent with respect to the terminals a,b for the circuit shown in Fig.
P4.74.
4.79 在圖 P4.79 電路中之可變電阻已經被調整，使得 Ro 上有最大功率轉移。
a) 求出 Ro 的值。
b) 求出 Ro 上最大之轉移功率。
c) 在附錄 H 中找出一個電阻，其電阻值接近(a) 小題，這個電阻轉移功率有多少？
4.91 a) 使用重疊定理求出在圖 P4.91 電路中之電壓 υ？
b) 求出在 10Ω 電組之消耗功率。
4.93 Use the principle of superposition to find the voltage υo in the circuit in Fig. P4.93.