Capacitor

What is the potential difference between the points $P$ and $Q$ in the circuit shown below, once the capacitors are fully charged?

Consider the shown circuit. The capacitors $C_1$ and $C_2$ have capacitances $2 \mu \mathrm{~F}$ and $8 \mu \mathrm{~F}$, respectively. The switch can connect point $X$ to either $Y$ or $Z$. Initially $X Y$ is connected until the capacitor ...

In the given circuit each of the resistors is of $1 \mathrm{k} \Omega$ resistance and each of the capacitors has $4 \mu \mathrm{~F}$ capacitance. What is the charge in the capacitor between the points B and F ?