In $SI$, Henry is the unit of

  • A

    Self inductance

  • B

    Mutual inductance

  • C

    (a) and (b) both

  • D

    None of the above

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Two coils of self inductance $2\,\,mH$ and $8\,\,mH$ are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is......$  mH$

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