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In a potentiometer the balance length with standard cadmium cell is 509 cm. The emf of a cell which when connected in the place of the standard cell gave a balance length of 750 cm is (emf of standard cell is 1.018V)

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1.5V

0.5V

1.08V

1.2V

answer is A.

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Detailed Solution

$\frac{E_{1}}{E_{2}} = \frac{I_{1}}{I_{2}}$

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