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NEET Sample Paper NEET Sample Test Paper-6

  • question_answer
    A varrying magnetic flux linking a coil is given by \[\phi =X{{t}^{2}}\] if at time \[t=3S,\]the emf induced is 9V, then the value of x is:

    A)  \[0.06wb{{s}^{-2}}\]         

    B)  \[1.5\,wb{{s}^{-2}}\]

    C)  \[0.666\,wb{{s}^{-2}}\]                 

    D)  \[-1.5\,wb{{s}^{-2}}\]

    Correct Answer: D

    Solution :

    Induced emf, \[e=-\frac{d\phi }{dt}=-2\times t\] \[(as,\,\phi =x{{t}^{2}})\] \[X=-\frac{e}{2t}=-1.5wb/{{s}^{2}}\]


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