Current Electricity and Electrical InstrumentHard
Question
n identical cells are joined in series with its two cells A and B in the loop with reversed polarities. EMF of each cell is E and internal resistance r. Potential difference across cell A or B is (here n > 4)
Options
A.
B.2E
C.
D.2E 
Solution
If all were in series all of them would have being getting discharged. But since, 2 are in opposite polarity, they will be getting charged.
V = E + iR getting charged i =
as (nE - 4) as 4 batteries will be cancelled out
= E +
R, = E + 
V = E + iR getting charged i =
as (nE - 4) as 4 batteries will be cancelled out
= E +
R, = E + Create a free account to view solution
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