(a) Formulate node-voltage equations for the circuit in Figure P310. (b) Solve for vx and ix when R1 R4 2 kV, R2

(a) Formulate node-voltage equations for the circuit in Figure P3–10.

(b) Solve for vx and ix when R1 ¼ R4 ¼ 2 kV, R2 ¼ R3 ¼
500 V, Rx ¼ 750 V, and vs ¼ 15 V.

(c) Repeat

(b) when R4 is a variable resistor that varies from 10 V to 10,000 V. At what value of R4 is the voltage across Rx ¼ 0 V? Hint: Use OrCAD to vary R4 by trial and error to approach the answer.AppendixLO1

+ ix VS R1 R3 Rx w +Vx- FIGURE P3-10 R R4