NEET Sample Paper NEET Sample Test Paper-15

  • question_answer In a metre bridge with standard resistance of\[5\Omega \]. In the left gap, the ratio of balancing lengths of metre bridge wire is 2:3. The unknown resistance is:

    A) \[10\Omega \]                         

    B) \[15\Omega \]

    C) \[10\Omega \]                         

    D) \[3.3\Omega \]

    E) \[7.5\Omega \]

    Correct Answer: D

    Solution :

    For meter bridge in balanced state \[\frac{5}{R}=\frac{{{\ell }_{1}}}{{{\ell }_{2}}}=\frac{2}{3},\] where R, is the value of unknown resistance \[\therefore \]\[2R=15,\]or \[R=7.5\Omega \] Hence, the correction option is [d].

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