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The terminals of a cell are cnnected to ...

The terminals of a cell are cnnected to resistance R and the falll of potential across R is balaced against the fall of potential on a potentiometer wire.When R is 20 `Omega` and 10 `Omega` respectively, the corresponding lengths of potentiometer wire are 1.5 m and 1.2 m Claculate the internal resistance of the cell

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The correct Answer is:
6.67 `Omega`
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