(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Three capacitors C1–C3, all initially uncharged, are placed in the circuit shown. The capacitances are C1=8.9 μF, C2=20 μF, C3=12.2 μF, and the battery voltages are V1=18 V, V2=10 V, V3=18 V.

What is the magnitude q1 of the charge on capacitor C1 once equilibrium has been established? Answer (given but I can't get it on my own): 0.000121 C

What is the magnitude q2 of the charge on capacitor C2 once equilibrium has been established? Answer (given but I can't get it on my own): 0.000287 C

What is the magnitude q3 of the charge on capacitor C3 once equilibrium has been established? Answer (given but I can't get it on my own): 0.000166 C

2. Relevant equations

Potential across each pair of battery / capacitor is the same.

3. The attempt at a solution

Equate the potential gain / drop from each branch to one another. But only get two equations (third is redundant) and have three unknowns.

Thanks in advance for any help.

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# Homework Help: Charge on capacitors each with a battery

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