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A potentiometer wire of length 1m …

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A potentiometer wire of length 1m has a resistance of 10 ohm . It is connected to a 6 v battery in series with a resistance of 5 ohm . Determine the EMF of the primary cell which gives a balance point at 40cm

    • Posted by Manoj Kumar 5 years, 3 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    ? ? 5 years, 3 months ago

    9volt...apply the formula r=(l1/l2-1)R and put the values of r, l1, and R i.e., 5, 40, and 10 respectively then find the value of l2 which will be 80/3 now put it in the formula E/V=l1/l2 V=6v and l1, l2 are 40 and 80/3 solve it your answer will be 9v.

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