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CUET

Q32. The resistance of a potentiometer wire of length 4 m is 10Ω. A resistance box and 2 V accumulator are connected in series with it. What resistance should be introduced in the box to have a potential drop of 1µV/mm of the potentiometer wire? (a) 799.9Ω (b) 790Ω (c) 9.995Ω (d) 4990Ω