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Physics 102:Lecture 7RC CircuitsRC CircuitsPhysics 102: Lecture 7, Slide 1RC Circuits Circuits that have both resistorsandcapacitors:RKRNaRClC+++ K Na Cl Withresistancein the circuitscapacitorsdo notS With resistancein the Circuits , capacitorsdo not chargeand dischargeinstantaneously it takes time (even if only fractions of a second).Physics 102: Lecture 7, Slide 2(even if only fractions of a second).RC CiiRC CircuitsUsed to controllably store and release energyToday: RC Circuits Charging Capacitors Discharging Capacitors Intermediate Behavior Physics 102: Lecture 7, Slide 3Charging CapacitorsStoring energy to use later Capacitor is initially uncharged and switch is open. Switch is then closed. What is current I0in circuit immediately thereafter?RCy What is current I in circuit alongtimelater? Physics 102: Lecture 7, Slide 4a long time later?SCharging Capacitors: t = 0 Capacitor is initially uncharged and ihiSihi h l dCswitch is open.

b=0 because the battery and capacitor are in series. C Physics 102: Lecture 7, Slide 8 ... ε C=1 mF R body +-+-S 2 S 1 After charging for 2 s, S 1 is opened. What is the current through the patient through the patient 01 s after S0.1 s after S2is closed if is closed if RRbody=100 =100 ...

  Series, Mf r