Two capacitors of $1\,\mu F$ and $2\,\mu F$ are connected in series. The resultant capacitance will be ..... $\mu F$.

Three capacitors of $2.0\;\mu F$,$3.0\;\mu F$,and $6.0\;\mu F$ are connected in series to a $10\,V$ source. The charge on the $3.0\;\mu F$ capacitor is ........ $\mu C$.

Seven capacitors,each of capacitance $2 \mu F$,are connected in a configuration to obtain an effective capacitance of $\frac{6}{13} \mu F$. The combination that will achieve this is:

In the given figure,the potential at point $A$ is $900 \ V$ and point $B$ is earthed. What will be the potential at point $P$ (in $V$)?

The figure shows a network of capacitors where the numbers indicate capacitances in microfarads $(\mu F)$. The value of capacitance $C$ if the equivalent capacitance between points $A$ and $B$ is to be $1\,\mu F$ is:

$A$ network of $4$ capacitors is connected to a battery as shown. The ratio of the charges on capacitors $C_{2}$ and $C_{4}$ is