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

  • question_answer
    Assertion: The alternating current lags behind the e.m.f. by a phase angle of \[\frac{\pi }{2}\], when AC flows through an inductor.
    Reason: The inductance reactance increases as the frequency of AC source decreases.

    A) If both assertion and reason are true and reason is the correct explanation of assertion.

    B) If both assertion and reason are true and reason is not the correct explanation of assertion.

    C) If assertion is true but reason is false.

    D) If both assertion and reason are false.

    E) If assertion is false but reason is true.

    Correct Answer: C

    Solution :

    Assertion is correct but reason is false because inductive reactance \[{{X}_{L}}=2\pi fL\]. So higher the frequency greater will be the inductive reactance.


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