‘n’ cells have emf ‘e’ and internal resistance ‘r’ and co – 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 = n2r
Answer» B. r = nR

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