**102. The drawing shows two capacitors that are fully charged (C1 = 2.00 µF, q1 = 6.00 µC;

C2 = 8.00 µF, q2 = 12.0 µC). The switch is closed, and charge flows until equilibrium is reestablished (i.e., until both capacitors have the same voltage across their plates). Find the resulting voltage across either capacitor.

 

w1040

 

When the switch is thrown we have two capacitors in parallel.  SO we can determine what the capacitance is and the charge will be the sum of the original charges since there is no source or sink of charges.  Then we can determine what the voltage across will be and that will be the voltage on both capacitors.  If we wish we could then determine how much charge remains on each capacitor.

 

 

 

 

Not asked for but let’s see the final charges on each

 

 

 

As it should!

 

 

 

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This page last updated on June 19, 2018