12th Class Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Assertion And Reason (MCQs) - Alternating Currents

  • question_answer
                 
    Directions: In the following questions, a statement of Assertion [A] is followed by a statement of Reason (R).
    Mark the correct choice as:
    Assertion [A]: In series LCR circuit resonance can take place.
    Reason (R): Resonance takes place if inductance and capacitive reactances are equal and opposite.

    A) Both Assertion [A] and Reason (R) are true and Reason (R) is the correct explanation of Assertion [A]        

    B) Both Assertion [A] and Reason (R) are true but Reason (R) is not the correct explanation of Assertion [A]

    C) Assertion [A] is true but Reason (R) is false

    D) Assertion [A] is false and Reason (R) is also false

    Correct Answer: A

    Solution :

    (a) At resonant frequency, \[{{X}_{L}}={{X}_{C}}\]. \[\therefore Z=R\] (minimum) therefore current in the circuit is maximum.


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