The graph shown plots potential difference (p.d.) $V$ across a cell against the current $I$ in the cell. When the cell is close to the end of its useful life, its internal resistance rises and its electromotive force (e.m.f.) falls. Which diagram shows a graph of $V$ against $I$ for the cell nearing the end of its useful life?
Physics 9702 · AS & A Level · Practical circuits