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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Alternating Current, Voltage and Power

  • question_answer
    For an ac circuit \[V=15\sin \omega t\] and \[I=20\cos \omega t\] the average power consumed in this circuit is                    [RPET 1999]

    A)            300 Watt                                

    B)            150 Watt

    C)            75 Watt                                  

    D)            zero

    Correct Answer: D

    Solution :

               \[P={{V}_{rms}}{{I}_{rms}}\cos \varphi ;\ \sin ce\ \varphi ={{90}^{o}}.\] So P = 0


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