12th Class Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Case Based (MCQs) - Alternating Currents

  • question_answer
    At what time is the energy stored completely magnetic?

    A)             \[\frac{T}{2},\frac{3T}{2},\frac{T}{4}\]                     

    B) \[\frac{T}{3},\frac{T}{9},\frac{T}{12}\]

    C)             \[0,2T,3T\]        

    D)             \[\frac{T}{4},\frac{3T}{4},\frac{5T}{4}\]

    Correct Answer: D

    Solution :

    (d) \[\frac{T}{4},\frac{3T}{4},\frac{5T}{4}\] Magnetic energy is maximum when electrical energy is equal to zero. Hence,         \[T=\frac{T}{4},\frac{3T}{4},\frac{5T}{4},....\]


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