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JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Graphical Questions

  • question_answer
    In an L?R circuit connected to a battery the rate at which energy is stored in the inductor is plotted against time during the growth of the current in the circuit. Which of the following best represents the resulting curve

    A)                          

    B)                          

    C)                          

    D)                   

    Correct Answer: A

    Solution :

                       \[U=\frac{1}{2}L{{i}^{2}}\]                    \[\therefore \]Rate \[=\frac{dU}{dt}=Li\left( \frac{di}{dt} \right)\]                    At \[t=0,\ i=0\]\[\therefore rate=0\]            At \[t=\infty ,\ i={{i}_{0}}\] but \[\frac{di}{dt}=0,\] therefore rate = 0


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