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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2000

  • question_answer
    The magnetic flux linked with a coil, in webers, is given by the equations \[\phi =3{{t}^{2}}+4t+9.\] Then the magnitude of induced emf at t = 2 second will be:

    A)  2 volt

    B)  4 volt

    C)  8 volt

    D)  16 volt

    Correct Answer: D

    Solution :

     The magnetic flux linked with a coil is given by \[\phi =3{{t}^{2}}+4t+9\] The relation for induced emf is \[E=\frac{d\phi }{dt}\] \[=\frac{d}{dt}(3{{t}^{2}}+4t+9)\] \[=6t+4\] Hence, the induced emf at t = 2 second is \[{{E}_{2}}=6\times 2+4=12+4=16\]volt


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