In an experiment on measurements of emf ...

In an experiment on measurements of emf of a cell by a potentiometer , the balancing length for a cell of emf E and internal resistance r is found to be I.Now if another cell of emf E and internal resistance 2r is connected in parallel to the first cell and balancing length determined , then the balancing length will be: "],[" 1) "(l)/(2)],[" 2) "21],[" 3) "(1)/(2)l],[" 4) "1]

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