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

  • question_answer
    Resonance occurs only when:

    A) \[{{\operatorname{X}}_{C}}\]=R

    B) \[{{\operatorname{X}}_{\operatorname{L}}}\]=R

    C) \[{{\operatorname{X}}_{\operatorname{L}}}\]=\[{{\operatorname{X}}_{C}}\]

    D) \[{{\operatorname{X}}_{C}}\]>\[{{\operatorname{X}}_{\operatorname{L}}}\]

    Correct Answer: C

    Solution :

    Option [c] is correct. Explanation: At resonance, capacitive reactance \[({{X}_{\operatorname{C}}})\] is equal to the inductive reactance \[({{X}_{\operatorname{L}}})\]. Circuit is totally resistive and the current amplitude becomes maximum.


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