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NEET Sample Paper NEET Sample Test Paper-10

  • question_answer
    In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has resistance\[0.1\Omega /cm\]. The value of unknown resistance X and the current drawn from the battery of negligible resistance is:

    A)  \[6\Omega ,\,5A\]                   

    B)  \[4\Omega ,\,0.1A\]

    C)  \[4\Omega ,\,1.0A\]                

    D)  \[12\Omega ,\,0.5A\]

    Correct Answer: C

    Solution :

    Resistance of the part AC \[{{R}_{AC}}=0.1\times 40=4\,\Omega \] and        \[{{R}_{CB}}=0.1\times 60=6\,\Omega \] In balanced condition \[\frac{X}{6}=\frac{4}{6}\]                                 \[X=4\Omega \] Equivalent resistance \[\operatorname{Re}q=5\Omega \]so current drawn from battery             \[i=\frac{5}{5}=1A\]


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