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Statement of a problem № 3770

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The terminals of a cell are connected to a resistance and the fall of potential across R is balanced against the fall across the potentiometer wire. When R is 20 and 10 S, respectively, the corresponding lengths on the potentiometer are 150 and 120 cm. Calculate the internal resistance of the cell (Fig. 12.16).

Solution:
The terminals of a cell are connected to a resistance and the fall of potential

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