Chapter 2685P26.21(a)1115 01300Cs=+..CCCspeq==+=FHGIKJ=−250250 600 8501850120 05961.....FFF FFµµµ(b)QCV===∆150895.VCbgafon 20 0. F∆∆VQC=−==89 544715 0 4 47 10 536001053632....C20.0 FVVFVC on 6.00 F89 5 63 226 3.Con 15 0and 300FIG. P26.21*P26.22(a)Capacitors 2 and 3 are in parallel and present equivalent capacitance 6C. This is in serieswith capacitor 1, so the battery sees capacitance 131621CCC+LNMOQP=−.(b)If they were initially unchanged, C1stores the same charge as C2and C3together. Withgreater capacitance, C3stores more charge than C2. Then QQQ132>>.(c)The 23||equivalent capacitor stores the same charge as C1. Since it has greatercapacitance, ∆VQC=implies that it has smaller potential difference across it than C1. Inparallel with each other, C2and C3have equal voltages: ∆∆∆
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