MCQ
A potentiometer has uniform potential gradient across it. Two cells connected in series (i) to support each other and (ii) to oppose each other are balanced over $6 \mathrm{~m}$ and $2 \mathrm{~m}$ respectively on the potentiometer wire. The e.m.f.'s of the cells are in the ratio of
- A$1: 2$
- B$1: 1$
- C$3: 1$
- ✓$2: 1$
