In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across 0.52 m of the potentiometer wire. If the cell is shunted by a resistance of $5 Ω$ , balance is obtained when the cell is connected across 0.4 m of the
wire. Find the internal resistance of the cell.

Question

Infinity Learn · Accepted Answer

$$r=R$$ $$l1l2$$−$$1$$ $$=5$$  $$0.520.4$$ −$$1$$  $$=$$  $$5$$ $$1.3$$−$$1$$ $$=$$  $$1.5$$  Ω

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