JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2010

  • question_answer
        The resistance of a galvanometer is\[25\,\Omega \], and it requires\[50\,\mu A\]for full deflection. The value of the shunt resistance required to convert it into an ammeter of 5 A is

    A)  \[2.5\times {{10}^{-4}}\Omega \]           

    B)  \[1.25\times {{10}^{-3}}\Omega \]

    C)  \[0.05\,\Omega \]                         

    D)  \[2.5\,\Omega \]

    Correct Answer: A

    Solution :

                    \[S=\frac{{{I}_{g}}G}{I-{{I}_{g}}}=\frac{50\times {{10}^{-6}}\times 24}{5-50\times {{10}^{-6}}}\]\[=2.5\times {{10}^{-4}}\,\Omega \]


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