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If the coulombic (Faradaic) efficiency of a flow battery is 1 and the magnitude of the cell potential for a set of operating conditions during

If the coulombic (Faradaic) efficiency of a flow battery is 1 and the magnitude of the cell potential for a set of operating conditions during charging is 2 V but while discharging is 1.9 V, what is the overall efficiency?

Ans : 0.95 ( should come, otherwise don't try)

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