.A cell of emf E and internal resistance r is connected across a variable resistor. Plot a graph showing variation of terminal voltage V of cell versus the current.

A cell of emf epsilon and internal resistance r is connected across a variable resistor R. Plot a graph showing variation of terminal voltage V of the cell versus the current I. Using the plot, show how the emf of the cell and its internal resistance can be determined.

A cell of emf E and internal resistance r is connected across an external resistance R . Plot a graph showing the variation o P.D . Across R , verses R .

A battery of emf E and internal resistance r is connected to a variable resistor R as shown in figure. Which one of the following is true ?