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NEET Sample Paper NEET Sample Test Paper-55

  • question_answer
    In an AC circuit the emf (e) and the current (i) at any instant are given respectively by \[e={{E}_{0}}\text{ }sin\text{ }\omega t,\text{ }i={{I}_{0}}\text{ }sin\text{ }(\omega t-\phi )\] The average power in the circuit over one cycle of AC is-

    A) \[\frac{{{E}_{0}}{{I}_{0}}}{2}\,\cos \,\,\phi \]             

    B) \[{{E}_{0}}{{I}_{0}}\]

    C) \[\frac{{{E}_{0}}{{I}_{0}}}{2}\]                     

    D) \[\frac{{{E}_{0}}{{I}_{0}}}{2}\,\sin \,\,\phi \]

    Correct Answer: A

    Solution :

    \[<P>\,\,=\,\frac{{{E}_{0}}{{I}_{0}}}{2}\,\cos \,\,\phi \]


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