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a cell of EMF E1 balances a length of 150cm of potentiometer wire, another cell of EMF 2V balances a length of 300cm of wire, EMF el is O 1V O 1.5 V 2.5 V 0 v 0.1 V |
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Answer» Answer: Correct option is A 1 ohm Given, Length of the potentiometer wirel 1 =150cm Resistance R=5Ω balancing length is OBTAINED at L 2 =125cm Internal resistance r=? we have, r=R[ l 2
l 1
−1] =5[ 125 150 −1] =5[ 125 25 ] =1Ω |
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