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Manipal Medical Manipal Medical Solved Paper-2012

  • question_answer
    The reactance of inductance at\[{{10}^{4}}Hz\]is\[10{{\,}^{4}}\Omega \]. Its reactance at\[2\times {{10}^{4}}Hz\]will be

    A)  \[{{10}^{4}}\,\Omega \]

    B)  \[2\times {{10}^{4}}\,\Omega \]

    C)  \[3\times {{10}^{4}}\,\Omega \]

    D)  \[4\times {{10}^{4}}\,\Omega \]

    Correct Answer: B

    Solution :

     \[{{X}_{L}}=\omega L=2\pi fL\] \[{{X}_{L}}\propto f\] If frequency is double, then reactance will be double.  


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