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JIPMER Jipmer Medical Solved Paper-2004

  • question_answer
    The resistance of a galvanometer is 50\[\Omega \] When 0.01 A current flows in it, full scale deflection is obtained in galvanometer, the resistance of shunt connected to convert galvanometer into an ammeter of range 5A, will be :

    A)  0.1\[\Omega \]               

    B)                         0.2\[\Omega \]                               

    C)         0.3\[\Omega \]                               

    D)         0.4\[\Omega \]

    Correct Answer: A

    Solution :

    Here:\[{{I}_{g}}=0.01\,A,\]\[G=50\,\Omega \] To convert the galvanometer in to an ammeter of range 5A, a low resistance is to be connected in parallel with coil of galvanometer. \[S=\frac{{{i}_{g}}\times G}{i-{{i}_{g}}}\]     \[=\frac{0.01\times 50}{5-0.01}=\frac{0.5}{4.99}=0.1\,\Omega \]


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