CMC Medical CMC-Medical VELLORE Solved Paper-2011

  • question_answer
     A 100 mH coil carries 1 A current. Energy stored in its magnetic field is

    A)  0.1 J                                     

    B)  0.05 J

    C)  0.5 J                                     

    D)  1 J

    E)  None of these

    Correct Answer: B

    Solution :

                    Energy stored \[E=\frac{1}{2}L{{i}^{2}}\]\[=\frac{1}{2}\times 100\times {{10}^{-3}}\times {{(1)}^{2}}\]\[=0.05\,J\]


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