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CMC Medical CMC-Medical Ludhiana Solved Paper-2008

  • question_answer
    In a potentiometer experiment, the galvano-meter shows no deflection when a cell is connected across 60 cm of the potentiometer wire. If the cell is shunted by a resistance of 6\[\Omega \], the balance is obtained across 50 cm of the wire. The internal resistance of the cell is

    A)  0.50                                      

    B)  0.60

    C)  1.20                                      

    D)  1.50

    Correct Answer: C

    Solution :

                    \[r=\frac{{{l}_{1}}-{{l}_{2}}}{{{l}_{2}}}\times R\] \[=\left[ \frac{60-50}{50} \right]\times 6\] \[=1.2\,\Omega \]


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