A) Series
B) Parallel
C) Mixed
D) Depends upon the relative values of external and internal resistance
Correct Answer: A
Solution :
Current taken from the combination of \[n\] cells each of internal resistance \[r\] in series with external resistance \[R\] is \[i=\frac{nE}{nr+R}\] Similarly, for parallel combination \[i=\frac{nE}{r+nR}\] For mixed grouping of \[n\] such cells in \[m\] rows with external resistance \[R\] is \[i=\frac{mnE}{mR+nr}\] It is obvious that maximum current obtained from each combination depends on relative values of external and internal resistance.
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