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The area of B-H loop for a ferromagnetic...

The area of `B-H` loop for a ferromagnetic material is `540 j m^(-3)`.` If the absolute permeability of free space is `4 pi xx 10^(-7) A^(-1)m^(-1)` and the area of the `I-H` loop of the ferromagnetic material is `(n)/(4 pi xx 10^(-7)) A^2 m^(-2)`, then calculate `n`.

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