12th Class Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Case Based (MCQs) - Alternating Current

  • question_answer
    The capacitive reactance of a \[5\mu F\]capacitor for a frequency of \[{{10}^{6}}\,Hz\] is

    A) \[0\centerdot 032\,\Omega \]

    B) \[2\centerdot 52\,\Omega \]

    C) \[1\centerdot 25\,\Omega \]

    D) \[4\centerdot 51\,\Omega \]

    Correct Answer: A

    Solution :

    Capacitive reactance, \[{{X}_{C}}=\frac{1}{\omega C}=\frac{1}{2\pi vC}\] \[=\frac{1}{2\pi \times {{10}^{6}}\times 5\times {{10}^{-6}}}=0.032\,\Omega \]


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