Levitation of a magnet by an alternating magnetic field

Autor:	M O Hunt, W S H Summerskill, W Gough
Rok vydání:	2012
Předmět:	Physics Condensed matter physics Electropermanent magnet Magnetism General Physics and Astronomy Vertical motion Spin-stabilized magnetic levitation Magnetic field Physics::Popular Physics Classical mechanics Physics::Plasma Physics Magnet Electrodynamic suspension Levitation
Zdroj:	European Journal of Physics. 34:181-187
ISSN:	1361-6404 0143-0807
DOI:	10.1088/0143-0807/34/1/181
Popis:	An experiment is described in which a small strong cylindrical magnet is levitated by a vertical non-uniform alternating magnetic field. Surprisingly, no superimposed constant field is necessary, but the levitation can be explained when the vertical motion of the magnet is taken into account. The theoretical mean levitation force is (0.26 ± 0.06) N, which is in good agreement with the levitated weight of (0.239 ± 0.001) N. This experiment is suitable for an undergraduate laboratory, particularly as a final year project. Students have found it interesting, and it sharpens up knowledge of basic magnetism.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6037098f3a97c2f0c3bc902f3ef149c8 https://doi.org/10.1088/0143-0807/34/1/181 Zobrazit plný text záznamu