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WB JEE Medical WB JEE Medical Solved Paper-2012

  • question_answer
    A Wheatstone bridge has the resistances \[10\,\Omega ,\,10\,\Omega ,\,\] and \[30\Omega \] in its four arms. What resistance joined in parallel to the \[30\Omega \] resistance will bring it to the balanced condition?

    A)  \[2\,\Omega \]

    B)  \[5\,\Omega \]

    C)  \[10\,\Omega \]

    D)  \[15\,\Omega \]

    Correct Answer: D

    Solution :

     In balanced Wheatstone bridge, \[\frac{1}{10}=\frac{1}{x}+\frac{1}{30}\] \[x=15\,\Omega \]


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