A cell with constant electromotive force sends a current $I$ through an external resistor of resistance $R$. The p.d. across the terminals of the cell is $V$. If the internal resistance $r$ of the cell becomes larger, what happens to $V$ and to $I$?
- A$V$ decreases, $I$ decreases
- B$V$ decreases, $I$ increases
- C$V$ increases, $I$ decreases
- D$V$ increases, $I$ increases