NEET Sample Paper NEET Sample Test Paper-9

  • question_answer A varying magnetic flux linking a coil is given by \[\theta =3{{t}^{2}}\]. The magnitude of induced emf in the loop at \[t=3s,\] is:

    A)  \[3\,V\]                       

    B)  \[9\,V\]

    C)  \[18\,V\]                     

    D)  \[27\,V\]

    Correct Answer: C

    Solution :

    As, \[|\varepsilon |=\left| \frac{d\phi }{dt} \right||\,\,=\frac{d}{dt}\,(3{{t}^{2}})=6t=18V\] (at \[t=3s\])

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