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Flux passing from air into iron is bent

  • A.not at all, flux crossing a boundary undeflected
  • B.back into the air, none of it entering the iron
  • C.toward the interface, almost along it within the iron
  • D.toward the normal within the iron

Answer: C

The tangential intensity is preserved so the tangential flux density is multiplied by the permeability, while the normal flux density is unchanged. In iron of relative permeability a thousand, flux entering at any appreciable angle emerges running almost parallel to the surface.

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