The given network has two cells of emfs $E_1$ and $E_2$, and two resistances $R_1$ and $R_2$. The ammeter A reads zero. What would the voltmeter $V$ read?

Upto what voltage will the capacitor $C$ in the diagram below be charged? Internal resistance of the cell $E$ is negligible.

The same is PD across $C$. Determine the potentials at points $A$ and $B$ in the given circuit, assuming earth at zero potential.

Determine the potentials of points $A$ and $B$ in the adjoining circuit with respect to earth.

Compute in the given circuit the potentials of points $A$ and $D$ terminal and terminal voltage across the $10 \mathrm{V}$ cell.

The point $B$ in the circuit is earthed. What will be the potential at the point $D$?