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Grade 12Discuss with colleagues and IITians

a potentiometer wire of length 10 m and resistance 10 ω per metre is connected in series with a resistance box and a 2 volt battery. if a potential difference of 100mv is balanced across the whole length of potentiometer wire, then the resistance introduced in the resistance will be

answer is 190 ohms im gettting 1900

Profile image of IramAnwar
7 Years agoGrade 12
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1 Answer

Profile image of Shivansh
7 Years ago
The potential drop in the potentiometer is 0.1v, which means 1.9v is going to the resistance. It also means that the resistance is 1.9 times greater than that of the potentiometer.
The resistance of potentiometer is 10*10 = 100 ohm
the resistance will be 190o hm

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