A Radi, HafezO Rasmussen, John2020-02-122020-02-122013Print ISBN 978-3-642-23025-7Online ISBN 978-3-642-23026-4https://doi.org/10.1007/978-3-642-23026-4_26https://t.ly/V3grdMSA Google ScholarIn this chapter we complete the description of magnetic interactions by briefly exploring the origins of magnetic fieldsenMagnetic FieldExternal Magnetic FieldOrbital Angular MomentumFerromagnetic MaterialCircuit BreakerBook chapterhttps://doi.org/10.1007/978-3-642-23026-4_26