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JEE Main & Advanced Physics Magnetism Question Bank Magnetic Equipments

  • question_answer
    When \[\sqrt{3}\]ampere current is passed in a tangent galvanometer, there is a deflection of 30° in it. The deflection obtained when 3 amperes current is passed, is [MP PMT 1997]

    A)            30°

    B)            45°

    C)            60°

    D)            75°

    Correct Answer: B

    Solution :

               \[i\propto \tan \theta \Rightarrow \frac{{{i}_{1}}}{{{i}_{2}}}=\frac{\tan {{\theta }_{1}}}{\tan {{\theta }_{2}}}\Rightarrow \frac{\sqrt{3}}{3}=\frac{\tan {{30}^{o}}}{\tan {{\theta }_{2}}}\Rightarrow \theta ={{45}^{o}}\]


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