The circuit diagram shows a cell whose internal resistance is negligible. The energy transferred per unit charge in moving charge all the way around the circuit is $E$. The potential difference (p.d.) across X is $V$. The cell is then exchanged for another cell with the same electromotive force (e.m.f.) but with significant internal resistance. What is the effect on $E$ and $V$ when the cell is replaced?
- Adecreases; decreases
- Bdecreases; increases
- Cno change; decreases
- Dno change; increases