n identical cells are joined in series with two cells 
and 
with reversed polarities. EMF of each cell is E and internal resistance is r. The potential difference across the cell A or B is ( 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
The two opposite cells 
and 
will cancel two more other cells, so net emf will be 
. So current
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