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in Physics by (38.0k points)
A cell of emf `E` and internal resistance `r` connected in the secondary gets balanced against length `l` of potentiometer wire. If a resistance `R` is connected in parallel with the cell, then the new balancing length for the cell will be
A. `((R)/(R-r))`
B. `((R-r)/(R))`
C. `((R)/(r))`
D. `((R)/(R+r))l`

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1 Answer

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by (37.8k points)
Correct Answer - D

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