The equivalent capacitance between points $A$ and $B$ in the figure shown below is .......... $\mu F$.

In the circuit shown,a potential difference of $30\, V$ is applied across $AB$. The potential difference between the points $M$ and $N$ is....$V$

What is the effective capacitance between points $X$ and $Y$ in $\mu F$?

Two capacitors of capacity $4 \mu F$ and $6 \mu F$ are connected in series to a $500 \ V$ battery. The potential difference across the $4 \mu F$ capacitor is: (in $V$)

In the following circuit,the resultant capacitance between $A$ and $B$ is $1\,\mu F$. Then the value of $C$ is

$A$ capacitor is made of a flat plate of area $A$ and the second plate has a staircase-like structure. The width of each stair is $a$ and its height is $b$. The total width of the plate is $2a$. The distance between the flat plate and the first part of the staircase is $d$. Find the capacity of the capacitor.