n cells have emf e and internal resistance r and connected to an – McqOptions

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1.	n cells have emf e and internal resistance r and connected to an external resistance R . They pass the same current whether the cells are connected in series or in parallel to each other. Then which of the following conditions are true?
A.	R = r
B.	r = nR
C.	R = nr
D.	R = n<sup>2</sup>r
Answer» B. r = nR

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