Questions
N identical cells, each of emf E and internal resistance r are joined in series. Out of N cells, n cells are wrongly connected i.e., their terminals are connected in reverse of that required for series connection . Let E0 be the emf of resulting battery and r0 be its internal resistance. Then
detailed solution
Correct option is C
For every cell that is wrongly connected, the emf decreases by 2E. However, internal resistance does not depend on the direction and therefore remains same for all cells.Talk to our academic expert!
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