A capacitor of unknown capacitance C is charged to 100 V and then connected across an initially uncharged 60-?F capacitor. If the final potential difference across the 60-?F capacitor is 40 V, determine C.
A. 49 ?F
B. 32 ?F
C. 40 ?F
D. 90 ?F
E. 16 ?F
Answer: C
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