Plot a graph showing the variation of current ‘I’ versus resistance ‘R’, connected to a cell of emf E and internal resistance ‘r’.

In the figure, I = current flowing

E = emf of the cell

r = internal resistance

R = External resistance

From the equation, the current flowing through the cell connected to a load is inversely proportional to load, i.e. R.

Therefore the graph of I vs R will be exponentially decreasing.