Resumo

SOSA, M. et al. Medición de la susceptibilidad magnética de sustancias líquidas en el laboratorio de física. Rev. mex. fís. E [online]. 2006, vol.52, n.2, pp.111-115. ISSN 1870-3542.

Measurements of the magnetic susceptibility of the non-ionized water are reported. A simple experiment based on the interaction of a magnet with the substance, measured by an analytical balance, was employed. A NdFeB permanent magnet, which has a magnetic moment m =0.58 ± 0.04 A·m² was used. A mean value for the bulk susceptibility of the non- ionized water of x (-6.8 ± 0.4) x 10^-4 (SI) was obtained, by using a theoretical model for the interaction between a dipole and a cylindrical sample. It is also demonstrated that a semi-infinite model is not a good description of the used experimental geometry. This is an experiment easy to be implemented into the basic physics laboratory, for the determination of magnetic susceptibilities of liquid substances.

Palavras-chave : Magnetic susceptibility; diamagnetic; substances.

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