3.18 Determine the node voltages in the circuit in Fig. 3.67 using nodal analysis. 1 20 Ω Figure 3.67 For Prob. 3.18. 40 S2 www 300 V + 2 40 Ω 15 A 3 40 Ω

A network connected between terminals a and b consists of two parallel combinations that are in series.  The first parallel combination is composed of a 10-Ω resistor and a 15-Ω resistor. The second parallel combination is composed of a 14-Ω resistor and a 35-Ω resistor. a) Draw the network. b) Determine its equivalent resistance.

2. Draw the Thevenin's equivalent circuit . a ww ww + 2 A 32 V 12 Q RL b