ch_appA_probs - APPENDIX Capacitors A 329 PROBLEMS A.1...

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329 APPENDIX A Capacitors
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330 Appendix A: Capacitors PROBLEMS A.1 Consider the circuit below. (a) Calculate the time constant for the circuit. (b) Sketch V 1 and V 2 on the given axes. Assume that V 1 =V 2 = 0v at time t = 0. V 1 1k .1 μF V 2 V 3 V 1 5V 0V 123 t(msec) 4 5
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331 APPENDIX A.2 Consider the following circuit. In this circuit both switches have been open for a long time before t = 0. At time t = 0 sec- onds, the switch at point A is closed (and the one at point B remains open). At time t = 3 milliseconds, simultaneously, the switch at point B is closed and the one at point A is opened. (a) Calculate the time constants, τ A and τ B for the circuit. τ A is the constant when switch A is closed and B is open, and τ B is the constant when switch B is closed and A is open. (b) Sketch V c (t), the voltage across the capacitor from t = 0 to 10 msecs. A.3 Consider the following circuit. In this circuit the switch has been open for a long time before t = 0. At time t = 0 seconds, the switch is closed. At time t = 20 milliseconds, the switch is
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ch_appA_probs - APPENDIX Capacitors A 329 PROBLEMS A.1...

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