618 The capacitor in Figure P618 carries an initial voltage vC0 = 25 V. At t...

6–18 The capacitor in Figure P6–18 carries an initial voltage vCð0Þ = – 25 V. At t = 0, the switch is closed, and thereafter the voltage across the capacitor is vCðtÞ = – 100 +

75 e^−2000t V. Derive expressions for iCðtÞ and pCðtÞ for t > 0: Is the capacitor absorbing power, delivering power, or both

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ic(f) + + t=0 Rest of vc(t) v(t) the 10 F circuit Pc(t) FIGURE P6-18