Lecture12_Kim - Lecture 12-1 Capacitor in RC Circuits I I...

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Lecture 12-1 Capacitor in RC Circuits / 0 t RC Q Q e I charging I discharging Switch closed at t=0. C initially uncharged, thus V 0 = 0 across C and I 0 = /R initially. Switch closed at t=0. C initially charged, thus V 0 = Q 0 /C across C and I 0 = V 0 /R initially. After a long time, C is fully charged and V = across C and I = 0 . After a long time, C is fully discharged and V = 0 across C and I = 0 . RC is a time constant
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Lecture 12-2 PHYS241 – Question 1 – September 29, 2011 In the circuit below, the switch S has been closed for a long time. What is the voltage across one of the capacitors? 15 V 1 F 1 F 1 k S a. 0 b. 5 V c. 7.5 V d. 10 V e. 15 V
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Lecture 12-3 PHYS241 – Question 2 – September 29, 2011 In the circuit below, the switch S has been open for a long time and then it is suddenly closed. What is the voltage across one of the capacitors just after S has been closed? 15 V 1 F 1 F 1 k S a. 0 b. 5 V c. 7.5 V d. 10 V e. 15 V
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Lecture 12-4 Behavior of Capacitors Charging Initially, the capacitor behaves like a wire . After a long time, the capacitor behaves like an open switch . Discharging Initially, the capacitor behaves like a battery .
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This note was uploaded on 12/07/2011 for the course PHYS 241 taught by Professor Wei during the Fall '08 term at Purdue University-West Lafayette.

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Lecture12_Kim - Lecture 12-1 Capacitor in RC Circuits I I...

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