NEET Sample Paper NEET Sample Test Paper-36

  • question_answer An average induced e.m.f. of 1 V appears in a coil when the current in it is changed from 10 A in one direction to 10 A in opposite direction in 0.5 sec. Self-inductance of the coil is

    A)  25 mH      

    B)  50 mH

    C)  75 mH       

    D)  100 mH

    Correct Answer: A

    Solution :

     \[|e|=L\frac{di}{dt}\Rightarrow 1=\frac{L\times \{10-(-10)\}}{0.5}\] \[\Rightarrow \] \[L=25\,mH\]

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