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In a potentiometer experiment, the balancing length with a cell is $560 c m$ . When an external resistance of $10 Ω$ is connected in parallel to the cell, the balancing length changes to $412 c m$ . the internal resistance of the cell in $o h m$ is

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Correct option is A

Balancing length l1=560 cm Balancing length l2=412 cm Resistance R=10 Ω Internal resistance r=? r=(l1−l2l2)R =560−412412×10 =3.59Ω ∴ r=3.6 Ω

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In a potentiometer experiment, the balancing length with a cell is 560 cm . When an external resistance of 10Ω is connected in parallel to the cell, the balancing length changes to 412 cm . the internal resistance of the cell in ohm is

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Ready to Test Your Skills?

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In a potentiometer experiment, the balancing length with a cell is $560 c m$ . When an external resistance of $10 Ω$ is connected in parallel to the cell, the balancing length changes to $412 c m$ . the internal resistance of the cell in $o h m$ is