Determine the initial and final conditions on iC in Figure P5.47. Assume VS = 9V, RS = 5k?, R1 = 10 k?, and R2 = R3 = 20 k?.
Analysis:
Before opening, the switch has been closed for a long time. Thus, we have a steady-state condition, and we treat the capacitor as an open circuit. The voltage across the capacitor is equal to the voltage across the resistances , , and . Thus,
After opening, the switch has been opened for a long time. Thus we have a steady-state condition, and we treat the capacitor as an open circuit. The voltage across the capacitor is equal to the voltage across the resistance . Thus,
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