What is the potential difference between points $A$ and $B$ in the circuit shown (in $V$)?

Three capacitors of $2\,\mu F$,$3\,\mu F$,and $6\,\mu F$ are joined in series,and the combination is charged by means of a $24\,V$ battery. The potential difference across the plates of the $6\,\mu F$ capacitor is.......$V$.

If the equivalent capacitance between $A$ and $B$ of the combination of capacitors shown in the figure is $3 C$,then the capacitor $C^{\prime}$ is equal to: (in $C$)

When three capacitors of equal capacities are connected in parallel and one of the same capacity is connected in series with the combination,the resultant capacity is $4.5 \mu F$. The capacity of each capacitor is: (in $\mu F$)

Two condensers of capacities $C$ and $2C$ are connected in parallel and then in series with a $3^{\text{rd}}$ condenser of capacity $3C$. The combination is charged to $V$ volts. The charge on the condenser of capacity $C$ is:

In the circuit shown,initially $C_1$ and $C_2$ are uncharged. After closing the switch: