A 3.0-?F capacitor charged to 40 V and a 5.0-?F capacitor charged to 18 V are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 3.0-?F capacitor?
A. 11 ?C
B. 15 ?C
C. 19 ?C
D. 26 ?C
E. 79 ?C
Answer: A
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