23_Chapter 16 HomeworkCH16 Electrical Energy and Capacitance

23_Chapter 16 HomeworkCH16 Electrical Energy and...

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Electrical Energy and Capacitance 57 16.42 Recognize that the 7.00 F and the 5.00 F µ of the center branch are connected in series. The total capacitance of that branch is 1 11 2.92 F 7.00 5.00 s C  =   4.00 =+ Then recognize that this capacitor, the F capacitor, and the 6.00 F capacitor are all connected in parallel between points a and b . Thus, the equivalent capacitance between points a and b is 4.00 eq C F 2.92 F+6.00 F 12.9 F µµ = ±²³³ ± ´ ±² µ²³³ ± ´ ¶²³³ ± ´ ·²³³ ± ´ 16.43 The capacitance is ( )( ) 12 2 2 4 2 13 0 -3 8.85 10 C N m 2.00 10 m 3.54 10 F 5.00 10 m A C d −− ×⋅ × == × and the stored energy is () 2 2 13 11 3.54 10 F 12.0 V 2.55
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