An electrolysis at a nearly constant current can be performed with the following arrangement: The…

An electrolysis at a nearly constant current can be
performed with the following arrangement:

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The 90-V source consists of dry cells whose voltage can be
assumed to remain constant for short periods. During the electrolysis, the
resistance of the cell increases from 25 V to 45 V because of depletion of
ionic species. Calculate the percentage change in the current, assuming that
the internal resistance of the batteries is zero.

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