Three uncharged capacitors of capacitance $C_1,C_2$ and ${\mathrm{C}}_3$ are connected as shown in the figure to one another at point $O$. Points $A, B$ and $D$ are at potentials $V_A,$ $V_B$ and $V_D$ respectively. Then the potential at $O$ will be,: 

In the circuit shown in the figure, the total charge is $750 \mu C$ and the voltage across capacitor $C_2$ is $20 \mathrm{V}$. Then the charge on capacitor ${\mathrm{C}}_2$ is :

In the circuit given below, the capacitor $C$ is charged by closing the switch $S_1$ and opening the switch $S_2$. After charging, the switch $S_1$ is opened and $S_2$ is closed, then the maximum current in the circuit

Two rods of copper and iron with the same cross-sectional area are joined at $S$ and a steady current $I$ flows through the rods as shown in the figure.

Choose the most appropriate representation of charges accumulated near the junction $S$.

In the circuit shown, the switch $S$ is initially closed for a long time. The switch is now opened so that the capacitor gets charged.

The time constant of the circuit is

A capacitor of $\mathrm{2 }\mathrm{\mu F}$ is charged as shown in the diagram. When the switch $\mathit{\text{S}}$ is turned to position $2$, the percentage of its stored energy dissipated is

Calculate the amount of charge on capacitor of $4 \mathrm{\mu F}.$ The internal resistance of battery is $1\mathrm{\Omega }:$

As shown in the figure below, if a capacitor $C$ is charged by connecting it with resistance $R,$ then energy given by the battery will be

In the given circuit diagram,

$E=5 \mathrm{V}, r=1 \mathrm{\Omega }, R_2=4 \mathrm{\Omega }, R_1=R_3=1 \mathrm{\Omega }$ and $C=3 \mu \mathrm{F}$

Then, what will be the numerical value of charge on each plates of the capacitor.