In a potentiometer arrangement for comparing emf of two cells, it was found that a cell of emf 1.25 V gives a balance point at 0.35 m length of the wire. On replacing the cell by another cell, the balance point shifted to 0.63 m. The emf of the second cell is:

1.5 V 0.69 V 1.75 V 2.25 V

2.25 V

The correct answer is Option (4) → 2.25 V