Question

The switch is initially at position A and fully charges C1, C2,C3 are initially uncharged. When the switch is changed to B, what is the resulting voltage across capacitor C1?

Answer 1

For Solving this Question, I would like to ask you that, do you have the detailed conception of : Circuit Diagram

Answer 2

simplify C2 and C3 into one capacitor before you start.
Also, the voltage of C1 initial is 12, this i think u know.
where're u stuck?