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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2004

  • question_answer
    To convert the range of a G ohm resistance voltmeter from V to nV, the value of series resistance needed is

    A)  \[(n-1)G\]                         

    B)  \[\text{G/}n\]

    C)  \[nG\]                                 

    D) \[\text{G/}(n-1)\]

    Correct Answer: A

    Solution :

    In series, the resistance needed \[R=\frac{V}{{{I}_{g}}}-G\]                 or            \[R=\left( \frac{V}{{{V}_{g}}}-1 \right)G\]                 or            \[R=\left( \frac{nV}{V}-1 \right)G\]                 \[\Rightarrow \]               \[R=(n-1)G\]


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