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NEET Sample Paper NEET Sample Test Paper-84

  • question_answer
    When current in a coil changes from 5 A to 2 A in 0.1 s, average voltage of 50 V is produced. The self-inductance of the coil is:

    A) 6 H                  

    B)        0.67 H

    C) 3 H                  

    D)        1.67 H

    Correct Answer: D

    Solution :

    [d] According to Faraday's law of electro- magnetic induction, Induced emf, \[e=\frac{Ldi}{dt}\]             \[50=L\left( \frac{5-2}{0.1\,\sec } \right)\] \[\Rightarrow \]\[L=\frac{50\times 0.1}{3}=\frac{5}{3}=1.67\,\,H\]


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