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  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2008

  • question_answer
    When a Daniel cell is connected in the secondary circuit of a potentiometer, the balancing length is found to be 540 cm. If the balancing length becomes 500 cm when the cell is short circuited with \[1\,\Omega ,\] the internal of the cell is

    A)  \[0.08\,\Omega \]          

    B)                         \[0.04\,\Omega \]

    C)  \[1.0\,\Omega \]            

    D)  \[1.0\,8\,\Omega \]

    E)  \[1.45\,\Omega \]

    Correct Answer: A

    Solution :

    Internal resistance, \[r=R\left( \frac{{{l}_{1}}-{{l}_{2}}}{{{l}_{2}}} \right)=1\left( \frac{540-500}{500} \right)=\frac{40}{500}=0.08\,\Omega \]


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