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Q. A 30 mu F capacitor initially charged to 20 mu C is discharged through a 1.2 k Omega resistor. How long does it take to decrease the capacitor's charge to 1.0 mu C?

Q. Two positive point charges are a fixed distance apart. The sum of their charges is QT. What charge should each have in order to (a) maximize an electric force between them, and (b) minimize it?

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