The initial permeability of an iron rod is

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The initial permeability of an iron rod is the permeability almost in non-magnetised state.

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The relative permeability is less than unity is case of

Last Answer : The relative permeability is less than unity is case of diamagnetic materials.

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Last Answer : (A) Approaches yield point

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Description : Please ripley me due to emergency

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Last Answer : Let radius of cylindrical rod =r ⇒ height =4r Volume of cylindrical rod =πr2h =πr2(4r) =4πr3 Volume of spherical balls of radius r=34​πr3 No. of balls =34​πr34πr3​=

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