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VMMC VMMC Medical Solved Paper-2003

  • question_answer
    If full scale deflection is obtained in a galvanometer of resistance 99 ohm by passing a current of \[{{10}^{-4}}\,A,\] the value of shunt which is connected in parallel measured from it is:

    A)  0.0909 \[\Omega \]       

    B)         1.0099\[\Omega \]        

    C)         0.9909  \[\Omega \]      

    D)         0.0099\[\Omega \]

    Correct Answer: A

    Solution :

    Given: \[G=99\,ohm,\,{{I}_{g}}={{10}^{-4}}A,\,I=1A\] Therefore, shunt resistance required is, \[S=\frac{{{I}_{g}}G}{I-{{I}_{g}}}=\frac{{{10}^{-4}}\times 99}{1-{{10}^{-4}}}\] \[=\frac{{{10}^{-4}}\times 99}{0.9999}\] Hence,                  \[S=0.0099\,\Omega \]


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