When the coil is wrapped around a ferromagnetic core, why is it difficult to det

Question - When the coil is wrapped around a ferromagnetic core, why is it difficult to determine the inductance?

Options:

A . The variation of flux is no longer proportional to the variation of current

B . Current does not exist in the coil

C . Flux does not exist in the coil

D . The value of current is too large to measure

Answer: Option A
Answer: (a).The variation of flux is no longer proportional to the variation of current

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