30_Chapter 16 HomeworkCH16 Electrical Energy and Capacitance

# 30_Chapter 16 HomeworkCH16 Electrical Energy and...

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64 CHAPTER 16 16.61 The charges initially stored on the capacitors are ( ) ( )( ) 3 11 6.0 F 250 V 1.5 10 C i QC V µ =∆= ( and ) ( )( ) 2 22 2.0 F 250 V 5.0 i 32 12 1.5 5.0 10 C=1.0 1 QQ Q When the capacitors are connected in parallel, with the negative plate of one connected to the positive plate of the other, the net stored charge is 3 0 C µµ eq =−=× −× × The equivalent capacitance of the parallel combination is 8.0 F CCC = += . Thus, the final potential difference across each of the capacitors is () 3 1.0 125 V 8.0 F eq Q V C × ∆= = = ()( ) ( ) and the final charge on each capacitor is 6.0 F 125 V 750 C 0.7 = = 5 mC and 2.0 F 125 V 250 C 0.2 = = 16.62 When connected in series, the equivalent capacitance is 1 1 1 1 4 F 4.0 F 2.0 F 3 eq C CC  =+ = + =   and the charge stored on each capacitor is
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