A resistance R is connected across a cell of emf `epsilon` and internal resistance r. A potentiometer now measures the potential difference between the terminals of the cell is V. Write the expression for r in terms of `epsilon`, V and R`.

A resistance R is connected across a cell of emf `epsilon` and interna

1.	A resistance R is connected across a cell of emf `epsilon` and internal resistance r. A potentiometer now measures the potential difference between the terminals of the cell is V. Write the expression for r in terms of `epsilon`, V and R`.
Answer» Expression : `r=(epsi/V-1)xxR`.

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A resistance R is connected across a cell of emf `epsilon` and internal resistance r. A potentiometer now measures the potential difference between the terminals of the cell is V. Write the expression for r in terms of `epsilon`, V and R`.

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