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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा JEE PYQ-Alternating Current

  • question_answer
    In an AC circuit, the voltage applied is\[cos\text{ }\alpha \] \[1/\sqrt{3}\]The resulting current in the circuit is\[1/\sqrt{2}\]. The power consumption in the circuit is given by                     [AIEEE 2007]

    A) \[{{x}^{2}}={{y}^{2}}+xy\frac{dy}{dx}\]

    B) p=zero

    C) \[{{x}^{2}}={{y}^{2}}+3xy\frac{dy}{dx}\]

    D) \[{{y}^{2}}={{x}^{2}}+2xy\frac{dy}{dx}\]

    Correct Answer: B

    Solution :

    [b] For given circuit current is lagging the voltage by\[A\cup B\cup C=S,\]. So, circuit is purely inductive and there is no power consumption in the circuit. The work done by battery is stored- as magnetic energy in the inductor.


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