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J & K CET Engineering J and K - CET Engineering Solved Paper-2007

  • question_answer
    In a meter bridge experiment, the ratio of the left gap resistance to right gap resistance is \[2:3,\] the balance point from left is

    A)  \[60\text{ }cm\]       

    B)  \[50\text{ }cm\]

    C)  \[40\text{ }cm\]        

    D)  \[20\text{ }cm\]

    Correct Answer: C

    Solution :

    In a meter bridge \[\frac{{{R}_{1}}}{{{R}_{2}}}=\frac{l}{100-l}\] \[\frac{2}{3}=\frac{l}{(100-l)}\] \[\Rightarrow \] \[200-2l=3l\] \[\Rightarrow \] \[5l=200\] \[\therefore \] \[l=40\,\,cm\]


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