In the given circuit, the $\mathrm{emf} E$ of the cell is

The potential difference across $8 \mathrm{\Omega }$ resistance is $48 \mathrm{V}$, as shown in the figure. The value of potential difference across $X$ and $Y$ points will be

The figure below shows currents in a part of electric circuit. The current $i$ is

The magnitude and direction of the current in the circuit shown will be

In the circuit element given here, if the potential at point $B, V_B=0$, then the potentials of $A$ and $D$ are given as

The current in the $4 \mathrm{\Omega }$ resistance is (battery is ideal)