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0 votes
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in Physics by (51.8k points)

A potentiometer wire of length 100 cm has a resistance of 10Ω . It is connnected in series with a resistance and a cell of emf 2 volt and neglible internal resistance source of emf 10 milli volt is balanced by a length of 40 cm of the potentiometer wire. What is the value of the external resistance.

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1 Answer

+1 vote
by (52.2k points)

Correct option is 790Ω

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