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JEE Main & Advanced AIEEE Solved Paper-2007

  • 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  Solved  Paper-2007  

    A) \[P=\frac{{{E}_{0}}{{l}_{0}}}{\sqrt{2}}\]            

    B)         P = zero              

    C)        \[P=\frac{{{E}_{0}}{{l}_{0}}}{2}\]            

    D)         \[P=\sqrt{2}\,{{E}_{0}}{{l}_{0}}\]

    Correct Answer: B

    Solution :

    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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