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  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2010

  • question_answer
    The mutual inductance of a pair of coils, each of N turns, is M henry. If a current of \[i\] ampere in one of the coils is brought to zero in t second, the emf induced per turn in the other coil, in volt will be

    A)  \[\frac{Mi}{t}\]

    B)  \[\frac{NMi}{t}\]

    C)  \[\frac{MN}{it}\]

    D)  \[\frac{Mi}{Nt}\]

    Correct Answer: A

    Solution :

    Induced emf, \[e=M\frac{di}{dt}\]       (in magnitude) \[\Rightarrow \] \[e=NM\left( \frac{i}{t} \right)\] \[\Rightarrow \] \[\frac{e}{N}=\frac{Mi}{t}\]


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