The circuit shown in Figure P 5.8-1 is separated into two parts by a pair of terminals. Call the part of the circuit to the left of the terminals circuit A and the part of the circuit to the right of the terminal circuit B. Use PSpice to do the following: (a) Determine the node voltages for the entire circuit. (b) Determine the Thevenin equivalent circuit of circuit A. (c) Replace circuit A by its Thevenin equivalent and determine the node voltages of the modified circuit. (d) Compare the node voltages of circuit B before and after replacing circuit A by its Thevenin equivalent. + 60 10 10 20 10 15 10 12 40 15 V 250 mA Figure P 5.8-1

ENGR 232 Dynamic Engineering Systems Lecture 3 Dr. Michael Ryan Agenda • Quick Review – Integrating factor • First Order Differential Equations – Existence – Models • Second Order Differential Equations – Models – Homogeneous equations – Auxiliary equation and its...