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12th Class Physics Alternating Current / प्रत्यावर्ती धारा Question Bank MCQ - Alternating Currents

  • question_answer
    In R-L-C series AC circuit, impedance cannot be increased by:

    A) increasing frequency of source

    B) decreasing frequency of source

    C) increasing the resistance

    D) increasing the voltage of the source  

    Correct Answer: A

    Solution :

    (a) increasing the voltage of the source                         \[Z=\sqrt{{{R}^{2}}+{{\left( {{X}_{L}}-{{X}_{C}} \right)}^{2}}}\]


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