电路与电子技术课件（英文版）-第九章.pptxVIP

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电路与电子技术课件（英文版）-第九章.pptx

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AC Network AnalysisTwo distinct mechanisms for energy storage exist in electric circuits: capacitance and inductance, both of which lead to the storage of energy in an electromagnetic field.The ideal capacitor and the ideal inductor. Ideal CapacitorEXAMPLE 4.2 Calculating Capacitor Current from Voltage (Page 134)Calculate the current through a capacitor from knowledge of its terminal voltage.Assumptions: The capacitor is initially discharged: v(t = 0) = 0. Ideal CapacitorEXAMPLE 4.2 Calculating Capacitor Current from Voltage (Page 134)Calculate the current through a capacitor from knowledge of its terminal voltage. Ideal CapacitorEXAMPLE 4.2 Calculating Capacitor Current from Voltage (Page 134)Calculate the current through a capacitor from knowledge of its terminal voltage. Ideal CapacitorEXAMPLE 4.2 Calculating Capacitor Current from Voltage (Page 134)Calculate the current through a capacitor from knowledge of its terminal voltage.There are many useful applications of this energy storage property of capacitors in practical circuits. Ideal CapacitorEXAMPLE 4.3 Calculating Capacitor Voltage from Current and Initial Conditions (Page 135)There are many useful applications of this energy storage property of capacitors in practical circuits.ProblemCalculate the voltage across a capacitor from knowledge of its current and initial state of charge. Ideal CapacitorEXAMPLE 4.3 Calculating Capacitor Voltage from Current and Initial Conditions (Page 135)There are many useful applications of this energy storage property of capacitors in practical circuits. Energy Storage in CapacitorsCapacitor was described as ____________________ elementAn expression for the energy stored in the capacitor WC(t) may be derived…The instantaneous power in a circuit element is equal to the product of voltage and current…… Energy Storage in CapacitorsCapacitor was described as an energy storage element.An expression for the energy stored in the capacitor WC(t) may be derived…The instantaneous power