Relative Permeability of Ferromagnetic Materials
An initially unmagnetized sample of iron is subjected to an external magnetic field of increasing strength. How does the relative permeability (μr) of the iron change as the field strength increases?
A
It remains constant regardless of field strength
B
It initially increases, then decreases toward 1
C
It decreases continuously from its initial value
D
It increases linearly with field strength
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