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

  • question_answer
    Two coils X and Y are placed in a circuit such that a current changes by 3A in coil X and magnetic flux change of 1.2 Wb occurs in Y. The value of mutual inductance of the coils is:

    A) 0.2 H                           

    B) 0.4 H    

    C) 3.6 H                           

    D) 0.6 H

    Correct Answer: B

    Solution :

    (b) 0.4 H Here, \[d\phi =1.2\] and \[dl=3\] We know that, \[\phi =Ml\] \[\therefore d\phi =Mdl\] \[\Rightarrow M=\frac{d\phi }{dl}=\frac{1.2}{3}=0.4\,H\]


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