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A 10 Omega resistance is connected in s...

A `10 Omega` resistance is connected in series with a cell of emf 10V. A voltmeter is connected in parallel to a cell, and it reads 9.9 V. Find internal resistance of the cell.

Text Solution

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`R = 10 Omega, E = 10 V = 9.9V, r = ?`

`r = ((E-V)/V)R`
` = ((10 - 9.9)/9.9) xx 10`
` = 0.101 Omega`
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