The given circuit is the part of a certain circuit. The current through resistors are shown. The potential difference $V_P-V_Q$ is

The potential difference between $A$ and $B$ in the following situation is

The current drawn by the battery in the situation shown in figure is

In the situation shown, the readings of ideal ammeters $A_1$ and $A_2$ are in the ratio

In the situation shown, the current in arm $PQ$ will be

In the circuit shown, the potential differences, $V_1$ (between $A$ and $B$) and $V_2$ (between $C$ and $D$), are

The potential difference between $A$ and $B$ in the circuit shown is

In the circuit shown, the current $i$ will be zero when $R$ is

For the determination of emf $E$ and internal resistance $\text{'}r\text{'}$ of a cell, the graph is obtained between potential difference $V$ between the terminal of the cell against the current $I$, which was changed by adjusting the rheostat, is as shown. The internal resistance of the cell is