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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2008

  • question_answer
    Two tangent galvanometers A and B are identical except in their number of turns. They are connected in series. On passing a current through them, deflections of \[60{}^\circ \] and \[30{}^\circ \]are produced. The ratio of the number of turns in A and B is

    A)  1 : 3           

    B)  3 : 1

    C)  1 : 2           

    D)  2 : 1

    Correct Answer: B

    Solution :

    As the current and the other factors are same for both the galvanometers \[N\propto \tan \theta \] \[\frac{{{N}_{1}}}{{{N}_{2}}}=\frac{\tan {{60}^{o}}}{\tan {{30}^{o}}}\] \[=\frac{\sqrt{3}}{1/\sqrt{3}}\] \[\Rightarrow \] \[\frac{{{N}_{1}}}{{{N}_{2}}}=3\]


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