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VIT Engineering VIT Engineering Solved Paper-2014

  • question_answer
    A coil of resistance 10\[\Omega \] and an inductance 5 H is connected to a 100 V battery. The energy stored in the coil is

    A) 325 erg                 

    B) 125 J

    C) 250 erg                 

    D) 250 J

    Correct Answer: D

    Solution :

    Current  \[\frac{8}{1}={{\left( 1+\frac{{{X}^{2}}}{{{R}^{2}}} \right)}^{3/2}}\]                 \[4=1+\frac{{{X}^{2}}}{{{R}^{2}}}\]                 \[3=\frac{{{X}^{2}}}{{{R}^{2}}}\]                 =  250 J


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