The length of a potentiometer wire is 400 cm. Leclanche cell gets balanced against 150 cm length of the wire. What is the new balancing length, if the length of the wire is altered to 600 cm?
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a
225 cm
b
300 cm
c
250 cm
d
200 cm
answer is A.
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Detailed Solution
Since resistance of remains same in both casesxℓ=x′ℓE400(150)=E400ℓ′ or ℓ′=225cm