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Two identical batteries of emf ε = 5.07 V and internalresistance r = 0.208 Ω are to be connectedto an external resistance R, either in parallel (Fig.27-52) or in series (Fig. 27-53). If R = 0.467Ω, what is the current i (in A) in the external resistance in the (a) paralle land (b) in the series arrangements?

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