A cell that has internal resistance is joined to a variable resistor $R$ as shown. The resistance of $R$ is then reduced gradually. What happens to the current $I$ and to the terminal potential difference across the cell?
- Acurrent $I$ decreases; terminal potential difference decreases
- Bcurrent $I$ decreases; terminal potential difference increases
- Ccurrent $I$ increases; terminal potential difference decreases
- Dcurrent $I$ increases; terminal potential difference increases