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MGIMS WARDHA MGIMS WARDHA Solved Paper-2003

  • question_answer
    In a galvanometer of 5 ohm resistance, a wire of 2 ohm resistance is used as a shunt. If the total current is 1 ampere, the fraction of current that will flow through the shunt is :

    A) 1.2 A                                     

    B) 0.7A

    C) 0.5 A                                     

    D) 0.3 A

    Correct Answer: B

    Solution :

    The current flowing through the shunt is \[{{I}_{s}}=\frac{G}{S+G}I\] Where,\[S=\]shunt resistance \[=2\,\Omega \] \[G=\]galvanometer resistance \[=5\,\Omega \] \[I=1A\] \[\therefore \]  \[{{I}_{s}}=\frac{5}{2+5}\times 1=\frac{5}{7}\]                 \[{{I}_{s}}=0.7\,A\]


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