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CMC Medical CMC-Medical Ludhiana Solved Paper-2010

  • question_answer
    The coefficient of mutual inductance when magnetic flux changes by \[2\times {{10}^{-2}}\]Wb and current changes by 0.01 A, will be

    A)  8 H                                        

    B)  4 H

    C)  3 H                                        

    D)  2 H

    Correct Answer: D

    Solution :

                     Coefficient of mutual induction of two coils is equal to the number of magnetic flux \[(\phi )\] linkages in one coil when a unit current \[(i)\] flows in the other. Therefore,        \[M=\frac{\phi }{i}\] Given,   \[\phi =2\times {{10}^{-2}}Wb,\,\,i=0.01\,A\] \[\therefore \]  \[M=\frac{2\times {{10}^{-2}}}{0.01}=2H\]


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