Chapter 28157(c)When the switch is opened, the branch containing R1is no longer part of the circuit. The capacitor dischargesthrough RR23+bgwith a time constant ofRRC15 03 0010 00 180+=+=af....k kF sΩΩµ. Theinitial currentIiin this discharge circuit is determinedby the initial potential difference across the capacitorapplied to +in series:IVIRiC=+=+=+=∆Ω233315 015 03 00278A kkA..FIG. P28.71(c)Thus, when the switch is opened, the current through R2changes instantaneously from333 A(downward) to 278 A(downward) as shown in the graph. Thereafter, it decaysaccording toIIeetRitR RCt227800180==>−+−fors..(d)The charge qon the capacitor decays from Qito Qi5according toqQeQQeettiiitt====−5551800 1805290af..ln.lnssmss ms*P28.72(a)First let us flatten the circuit on a 2-D plane
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