Consider a conductor of the variable cross-section in which current is flowing from cross-section $1$ to $2$.

Then, 

A single battery is connected to three resistances as shown in the figure.

The potential difference between points $A$ and $B$ as shown in the figure is $16 \mathrm{V}$. Then,

In the circuit shown,the cell has emf $10 \mathrm{V}$ and internal resistance $1 \mathrm{\Omega }$.

When some potential difference is maintained between $A$ and $B,$ current $I$ enters the network at $A$ and leaves at $B$ (see figure).

In the circuit shown in figure, some potential difference is applied between $A\text{ and} B$. The equivalent resistance between $A \text{and }B$ is $R$.

A battery of emf $E$ and internal resistance $r$ is connected across a resistance $R.$ Resistance $R$ can be adjusted to any zero. A graph is plotted between the current passing through the resistance $\left(I\right)$ and potential difference $\left(V\right)$ across it. Select the correct alternatives.

In the given circuit (figure),