Two capacitors of values $0.6 \ \mu F$ and $0.3 \ \mu F$ are connected in series with a $6 \ V$ source. Find the ratio of energy stored in each capacitor.

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:

Seven capacitors,each of capacitance $2 \mu F$,are to be connected to obtain an equivalent capacitance of $\left(\frac{10}{11}\right) \mu F$. Which of the following combinations is possible?

Two capacitors,each having a capacitance of $2 \mu F$,are connected in series. What will be the effective capacitance of these capacitors (in $\mu F$)?

Three parallel plate air capacitors are connected in parallel. Each capacitor has plate area $A/3$ and separation between the plates is $d$, $2d$, and $3d$ respectively. The equivalent capacity of the combination is ($\epsilon_0$ is the permittivity of free space).

In the circuit shown in the figure,$C = 6\,\mu F$. The charge stored in the capacitor of capacity $C$ is......$\mu C$.