chapter25- 028 - 28. Initially the capacitors C1, C2, and...

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(b) and (c) At C 3 = 0, the graph indicates V 1 = 2.0 V. The above expression consequently implies C 1 = 4 C 2 . Next we note that the graph shows that, at C 3 = 6.0 µ F, the voltage across C 1 is exactly half of the battery voltage. Thus, 1 2 = C 2 + 6.0 µ F C 1 + C 2 + 6.0 µ F = C 2 + 6.0 µ F 4 C 2 + C 2 + 6.0 µ F which leads to C 2 = 2.0 µ F. We conclude, too, that C 1 = 8.0 µ F. 28. Initially the capacitors C 1 , C 2 , and C 3 form a combination equivalent to a single capacitor which we denote
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