Two capacitors connected in parallel having the capacities $C_1$ and $C_2$ are given $q$ charge,which is distributed among them. The ratio of the charge on $C_1$ and $C_2$ will be

Three capacitors of values $6\, \mu F, 3\, \mu F$ and $9\, \mu F$ are connected as shown in the figure. This combination is connected to a $10\, V$ battery. What is the potential difference across the plates of the $9\, \mu F$ capacitor in $V$?

The potential at the point $B$ in the given figure is . . . . . . $V$.

Find the equivalent capacitance between $A$ and $B$. (in $C$)

Ten capacitors are joined in parallel and charged with a battery up to a potential $V$. They are then disconnected from the battery and joined again in series. The potential of this combination will be ....... $V$.

The equivalent capacitance between points $a$ and $b$ in the given circuit is ........ $\mu F$.