JEE Main & Advanced JEE Main Solved Paper-2017

  • question_answer
    When a current of 5 mA is passed through a galvanometer having a coil of resistance \[15\,\Omega ,\] it shows full scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into to voltmeter of range 0 - 10 V is:             JEE Main Solved Paper-2017

    A)  \[2.535\times {{10}^{3}}\Omega \]        

    B) \[4.005\times {{10}^{3}}\Omega \]

    C)  \[1.985\times {{10}^{3}}\Omega \]        

    D)  \[2.045\times {{10}^{3}}\Omega \]

    Correct Answer: C

    Solution :

     \[10=(5\times {{10}^{-3}})(15+R)\]                 \[r=1985\,\Omega \]


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