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
c
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Point charges of equal magnitudes (25 nC) and opposite signs are placed on (diagonally) opposite corners of a 60-cm × 80-cm rectangle. If point A is the corner of this rectangle nearest the positive charge and point B is located at the intersection of the diagonals of the rectangle, determine the potential difference, VB - VA
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