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

  • question_answer
    At resonance, the impedance in series LCR circuit is

    A) maximum.

    B) zero.

    C) infinity.

    D) minimum.

    Correct Answer: D

    Solution :

    Option [d] is correct.
    Explanation: Impedance of a series LCR circuit is \[\operatorname{Z}=\sqrt{{{\operatorname{R}}^{2}}+{{({{X}_{C}}-{{X}_{L}})}^{2}}}\]
    At resonance, \[{{X}_{C}}={{X}_{L}}\] So, Z is minimum.


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