A power supply has an open-circuit voltage of 40.0 V and aninternal resistance of 2.00 V. It is used to charge two storagebatteries connected in series, each having an emf of 6.00 Vand internal resistance of 0.300 V. If the charging current isto be 4.00 A, (a) what additional resistance should be addedin series? At what rate does the internal energy increase in(b) the supply, (c) in the batteries, and (d) in the addedseries resistance? (e) At what rate does the chemical energyincrease in the batteries?
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