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Two batteries of emf e(1) and e(2) havin...

Two batteries of emf `e_(1) and e_(2)` having internal resistance `r_(1) and r_(2)` respectively are connected in series to an external resistance R. Both the batteries are getting discharged. The above described combination of these two batteries has to produce a weaker current than when any one of the batteries is connected to the same resistor. For this requirement to be fulfilled

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