(Answered) Three 150-v cells each with an internal resistance of 00500

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Three 1.50-V cells, each with an internal resistance of 0.0500?, are connected in series to form a battery with a current of 0.850A in each cell.

A. Find the current in the external circuit.
B. What is the emf of the battery.
C. Find the internal resistance of the battery.

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