In the circuit shown in Figure P5.61:
VS1 = 15V VS2 = 9V
RS1 = 130? RS2 = 290?
R1 = 1.1k? R2 = 700?
L = 17mH C = 0.35?F
Assume that DC steady-state conditions exist for t < 0. Determine the voltage vC across the capacitor and the current iL through the inductor as t ??.
Analysis:
The conditions that exist at have no effect on the long-term DC steady state conditions at . In the long-term DC steady state the inductor may be modeled as a short circuit and the capacitor as an open circuit. In this case, the inductor short circuits the R1 branch and the R2 C branch. Thus, the voltage across these branches and the current through them are zero. In other words all of the current produced by the 9V source travels through the inductor in this case.
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