For the arrangement of capacitors as shown in the circuit,the effective capacitance between the points $A$ and $B$ is (capacitance of each capacitor is $4 \mu F$): (in $\mu F$)

The effective capacitance between $X$ and $Y$ is ... $\mu F$.

Three capacitors of capacitances $2 \;pF$,$3 \;pF$,and $4 \;pF$ are connected in parallel.
$(a)$ What is the total capacitance of the combination?
$(b)$ Determine the charge on each capacitor if the combination is connected to a $100 \;V$ supply.

Three capacitors,each of capacitance $C$ and breakdown voltage $V$,are connected in series. Find the equivalent capacitance and the equivalent breakdown voltage.

The equivalent capacitance of three capacitors of capacitance $C_1, C_2$ and $C_3$ connected in parallel is $12$ units and their product is $C_1 \cdot C_2 \cdot C_3 = 48$. When the capacitors $C_1$ and $C_2$ are connected in parallel,the equivalent capacitance is $6$ units. Then the capacitances are:

Three capacitors,each of $3\,\mu F$,are provided. These cannot be combined to provide the resultant capacitance of.........$\mu F$