Two power supplies are arranged in separate circuits. The current from each power supply has the same magnitude. Power supply P has an electromotive force (e.m.f.) of $1.5\ \text{V}$ and power supply Q has an e.m.f. of $3.0\ \text{V}$. Which statements are correct?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only