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  4. Five cells each of emf E and internal resistance r are connected in series. Due to oversight one cell is connected wrongly. The equivalent internal resistance of the combination is

Q. Five cells each of emf and internal resistance are connected in series. Due to oversight one cell is connected wrongly. The equivalent internal resistance of the combination is

 1482  201 Current Electricity Report Error

Solution:

All the internal resistances will be still in series, there will be no impact of polarity on the equivalent resistance