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The potentiometer wire of length 200 cm ...

The potentiometer wire of length `200 cm` has a resistance of `20 Omega`. It is connected in series with a resistance `10 Omega` and an accumulator of emf `6 V` having negligible internal resistance. A source of `2.4 V` is balanced against length `1` of the potentiometer wire. Find the length `l` of the potentiometer wire. Find the length `l`

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