JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Faraday's and Lenz's Law

  • question_answer
    The magnetic field in a coil of 100 turns and 40 square cm area is increased from 1 Tesla to 6 Tesla in 2 second. The magnetic field is perpendicular to the coil. The e.m.f. generated in it is                                   [MP PMT 1994]

    A)            \[{{10}^{4}}\,V\]                 

    B)            1.2 V

    C)            1.0 V                                        

    D)            \[{{10}^{-2}}\,V\]

    Correct Answer: C

    Solution :

                       \[e=-N\left( \frac{\Delta B}{\Delta t} \right).A\cos \theta \]\[=-100\times \frac{(6-1)}{2}\times (40\times {{10}^{-4}})\cos 0\]            \[\Rightarrow \,|e|\,=1\ V\]


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