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Three cells each of emf 1.5 V, after bei...

Three cells each of emf 1.5 V, after being connected in series with each other, are connected to the ends of a resistance. The current obtained is 1 A. When the cells are connected in parallel across the ends of the same resistance, the current is found to be 0.36 A. Find the external resistance and the internal resistance of each cell.

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