8.42 In the circuit in Fig. P8.42, the resistor is adjusted PSPICE for critical damping. The initial capacitor voltage is MULTISIN 15 V, and the initial inductor current is 6 mA. a) Find the numerical value of R. b) Find the numerical values of i and di/dt immedi- ately after the switch is closed. c) Find vc(t) for t≥ 0. Figure P8.42 R w + t=0 VC 320 nF 125 mH

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8.42 In the circuit in Fig. P8.42, the resistor is adjusted
PSPICE for critical damping. The initial capacitor voltage is
MULTISIN 15 V, and the initial inductor current is 6 mA.
a) Find the numerical value of R.
b) Find the numerical values of i and di/dt immedi-
ately after the switch is closed.
c) Find vc(t) for t≥ 0.
Figure P8.42
R
w
+
t=0
VC
320 nF
125 mH
Transcribed Image Text:8.42 In the circuit in Fig. P8.42, the resistor is adjusted PSPICE for critical damping. The initial capacitor voltage is MULTISIN 15 V, and the initial inductor current is 6 mA. a) Find the numerical value of R. b) Find the numerical values of i and di/dt immedi- ately after the switch is closed. c) Find vc(t) for t≥ 0. Figure P8.42 R w + t=0 VC 320 nF 125 mH
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