Two capacitors of $2 \mathrm{\mu }\text{F}$ and $3 \mathrm{\mu }\text{F}$ are connected in series. The potential at point $A$ is $1000 \mathrm{V}$ and the outer plate of $3 \mathrm{\mu }\text{F}$ capacitor is earthed. The potential at point $B$ is, 

Four plates are arranged as shown in the diagram. If area of each plate is $A$ and the distance between two neighbouring parallel plates is $d$, then the capacitance of this system will be, 

Three capacitors are connected as shown in the figure. Then the charge on capacitor plate $C_1$ is,

In the combination shown in the figure, the ideal voltmeter reading will be

In the figure shown, the effective capacitance between the points $P$ and $Q$, if each has capacitance $C,$ is-

The equivalent capacitance in the circuit shown in figure will be

The effective capacitance between $A$ and $B$ is