\( \mathrm{n} \) rows each containing \( m \) cells in series, are ...

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\( \mathrm{n} \) rows each containing \( m \) cells in series, are joined in parallel. Maximum current is taken from this combination in a \( 3 \Omega \) resistance. If the total number of cells used is \(24\) and internal resistance of each cell is \( 0.5 \Omega \), find the value of \( m \) and \( n \).
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