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JEE Main & Advanced Sample Paper JEE Main Sample Paper-15

  • question_answer
    Sensitiveness of galvanometer is 10 division per amp. In order to change the sensitiveness to 2 divisions per amp how much shunt should be used? Resistance of galvanometer \[=100\,\Omega \]

    A) \[2\,\Omega \]                                

    B) \[25\,\Omega \]

    C) \[30\,\Omega \]                                              

    D) \[45\,\Omega \]

    Correct Answer: B

    Solution :

    \[n=\frac{\text{orignal}\,\text{deflection}}{\text{New}\,\text{deflection}}=\frac{10}{2}=5\] \[S=\frac{G}{n-1}=\frac{100}{5-1}=25\]


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