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NEET AIPMT SOLVED PAPER MAINS 2012

  • question_answer
    In a coil of resistance \[10\,\Omega \], the induced   2 current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber is

    A)  8                            

    B)  2            

    C)  6                            

    D)  4

    Correct Answer: B

    Solution :

    \[I=\left| \frac{1}{R}\frac{d\phi }{dt} \right|\] \[|d\phi |=|IRdt|\] \[d\phi =\](area of triangle)\[\times R\] \[=\left( \frac{1}{2}\times 4\times 0.1 \right)\times 10=2\,\text{Wb}\]


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