TAILIEUCHUNG - Electric Circuits, 9th Edition P24

Electric Circuits, 9th Edition P24. Designed for use in a one or two-semester Introductory Circuit Analysis or Circuit Theory Course taught in Electrical or Computer Engineering Departments. Electric Circuits 9/e is the most widely used introductory circuits textbook of the past 25 years. As this book has evolved over the years to meet the changing learning styles of students, importantly, the underlying teaching approaches and philosophies remain unchanged. | 206 Inductance Capacitance and Mutual Inductance t 0 the inductor was switched instantaneously to position b where it remained for s before returning instantaneously to position a. The d Arsonval voltmeter has a full-scale reading of 20 V and a sensitivity of 1000 il V. What will the reading of the voltmeter be at the instant the switch returns to position a if the inertia of the d Arsonval movement is negligible Figure Voltmeter Section The current shown in Fig. is applied to a pspice F capacitor. Tile initial voltage on the capaci-MULTISIM . tor is zero. a Find the charge on the capacitor at t 15 s. b Find the voltage on the capacitor at t 30 cs. c How much energy is stored in the capacitor by this current Figure i mA The rectangular-shaped current pulse shown in pspice Fig. is applied to a cF capacitor. The ini-MumsiM vo tage on capacitor is a 15 V drop in the reference direction of the current. Derive the expression for the capacitor voltage for the time intervals in a - d . a 0 t 10 ts b 10 ts t 20 jus c 20 jls t 40 ts d 40 cs r oo c Sketch v t over the interval -10 cs t 50 s. A 20 j F capacitor is subjected to a voltage pulse having a duration of 1 s. The pulse is described by the following equations 30i2 V vc t 30 Z - 1 2V o 0 t s s t 1 s elsewhere. The initial voltage on the cF capacitor shown in pspice Fig. a is -20 V. The capacitor current has MULTISIM the waveform shown in Fig. b . a How much energy in microjoules is stored in the capacitor at t 500 zs b Repeat a for t oo. Sketch the current pulse that exists in the capacitor during the 1 s interval. The voltage across the terminals of a F capaci-PSP CE tor is MULTISIM _ J150 V v 1 VO5 ÆO5000 V t 0 t 0. Problems 207 The initial current in the capacitor is 250 mA. Assume the passive sign convention. a What is the initial energy stored in the capacitor b Evaluate the coefficients Aj and A2. c What is the .

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