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NEET Sample Paper NEET Sample Test Paper-5

  • question_answer
    An average emf of 20V is induced in an inductor when the current in it, changed from \[2.5\,A\]in one direction to the same value in opposite direction in \[0.1\text{ }S,\]the self-inductance of inductor is:

    A)  \[0.4\,H\]         

    B)  \[1\,H\]

    C)  \[2\,H\]                       

    D)  \[0.6\,H\]

    Correct Answer: A

    Solution :

     As    \[e=L\frac{dl}{dt}\] \[\Rightarrow \]               \[20V=L\frac{5}{0.1}\]                 \[L=\frac{2}{5}=0.4H\]              


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