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Two cells of emf `epsilon_1` and `epsilon_2(epsilon_1>epsilon_2)` are connected as shown in figure. When a potentiometer is connected between A and B, the balancing length of the potentiometer wire is 300 cm. On connecting the same potentiometer between A and C, the balancing length is 100 cm. The ratio is `epsilon_1 : epsilon_2` is
A. |
3 : 1 |
B. |
1 : 3 |
C. |
2 : 3 |
D. |
3 : 2 |
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