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12th Class Physics Electro Magnetic Induction Question Bank MCQs - Electromagnetic Induction

  • question_answer
    The magnetic flux linked with a coil is given by an equation \[\phi =5{{t}^{2}}+2t+3\]. The induced e.m.f. in the coil at the third second will be

    A) 32 units

    B) 54 units

    C) 40 units

    D) 65 units

    Correct Answer: A

    Solution :

    Option [a] is correct. Explanation: Induced e.m.f. =\[d\phi /dt\] = \[5{{t}^{2}}+2t+3\]=\[-(10t+2)=-32\]


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