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Unformatted text preview: about the gravitational force.) Just before they collide, what is the total kinetic energy ? Where does this energy come from ? Is the energy conserved in this case ? Show your work. (9) [Charging Capacitor] The capacitor is initially uncharged, and the switch is open. Then at time t = 0, the switch is closed. a b c d ! + R C S 2 V bc (t) t V cd (t) t V db (t) t (a) Draw graphs showing how each of the labeled voltages below varies with time t, including t < 0 (before the switch is closed) as well as t > 0. For the following questions: ε = 10 V, R = 2000 Ω , C = 400 μF (μF = 106 F) (b) What is the current in the resistor just after the switch is closed? Please show your work. (c) What is the final charge on the capacitor after a long time? Please show your work. (d) At what time t is the voltage across the resistor equal in magnitude to the voltage across the capacitor? Please show your work. Switch closed...
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This note was uploaded on 12/25/2009 for the course PHYS 213 at Cornell.
 '08
 PERELSTEIN
 Physics, Work

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