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ch25_p17 - 17(a After the switches are closed the potential...

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17. (a) After the switches are closed, the potential differences across the capacitors are the same and the two capacitors are in parallel. The potential difference from a to b is given by V ab = Q / C eq , where Q is the net charge on the combination and C eq is the equivalent capacitance. The equivalent capacitance is C eq = C 1 + C 2 = 4.0 × 10 –6 F. The total charge on the combination is the net charge on either pair of connected plates. The charge on capacitor 1 is ( ) ( ) 6 4 1 1 1.0 10 F 100V 1.0 10 C q CV = = × = × and the charge on capacitor 2 is
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