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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2011

  • question_answer
    The deflection in a moving coil galvanometer is reduced to half when it is shunted with a 40\[\Omega \] coil. The resistance of the galvanometer is

    A)  80\[\Omega \]           

    B)  40\[\Omega \]

    C)  20\[\Omega \]            

    D)  15\[\Omega \]

    Correct Answer: B

    Solution :

    We know,      \[\frac{{{I}_{G}}}{I}=\frac{1}{2}\] \[\frac{S}{G+S}=\frac{1}{2}\] \[\frac{{{I}_{G}}}{I}=\frac{40}{G+40}=\frac{1}{2}\]


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