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NEET Sample Paper NEET Sample Test Paper-57

  • question_answer
    In a potentiometer experiment, the balancing with a cell is at length 240cm. On shunting the cell with a resistance of 2Q, the balancing becomes 120cm. The internal resistance of the-cell is:

    A) \[1\Omega \]                 

    B) \[0.5\Omega \]

    C) \[4\Omega \]                             

    D) \[2\Omega \]

    Correct Answer: D

    Solution :

    [d] Internal resistance \[r=R\left[ \frac{{{\ell }_{1}}}{{{\ell }_{2}}}-1 \right]\] \[=2\left[ \frac{240}{120}-1 \right]=2\Omega \]


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