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12th Class Physics Alternating Current / प्रत्यावर्ती धारा Question Bank MCQ - Alternating Currents

  • question_answer
    In the question number 43, the net power absorbed by the circuit in one complete cycle is:

    A) 5 W                 

    B) 10 W   

    C) 15 W                            

    D) zero

    Correct Answer: D

    Solution :

    (d) zero As     \[P={{V}_{rms}}{{l}_{rms}}\cos \phi \] In a pure capacitance circuit, the phase difference between alternating voltage and current is \[\pi /2\]. Hence  \[P={{V}_{rms}}{{l}_{rms}}\cos \,90{}^\circ =0\]


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