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The balancing lengths of potentiometer w...

The balancing lengths of potentiometer wire are `l_(1)` and `l_(2)` when two cells of emf `E_(1)` and `E_(2)` are connected in the secondary circuit in series first to help eachg other and next to oppose each other `(E_(1))/(E_(2))` is equal to `(E_(1)gtE_(2))`

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