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(34. A potentiometer wire of length L an...

(34. A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E, and a resistance 1. An unknown e.m.f. E is balanced at a length 1 of the potentiometer wire. The e.m.f. E will be given by Eo? LEor (b) (r+gll (a) (d) For I (r+r) L 1. horizontal

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