Four identical capacitors are connected in series with a battery of $emf$ $10 \, V$. The point $X$ is earthed. Find the potential of point $A$. (in $, V$)

In the following circuit,the equivalent capacitance between terminal $A$ and terminal $B$ is: (in $\mu F$)

Three capacitors each of capacitance $9 \;pF$ are connected in series.
$(a)$ What is the total capacitance of the combination?
$(b)$ What is the potential difference across each capacitor if the combination is connected to a $120 \;V$ supply?

Three capacitors each of capacitance $C$ and of breakdown voltage $V$ are joined in series. The capacitance and breakdown voltage of the combination will be

Three capacitors each of capacitance $1\,\mu F$ are connected in parallel. To this combination,a fourth capacitor of capacitance $1\,\mu F$ is connected in series. The resultant capacitance of the system is.......$\mu F$

$A$ network of four $10 \; \mu F$ capacitors is connected to a $500 \; V$ supply,as shown in the figure. Determine:
$(a)$ the equivalent capacitance of the network and
$(b)$ the charge on each capacitor.