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ERIC Number: EJ980894
Record Type: Journal
Publication Date: 2012-Mar
Pages: 6
Abstractor: ERIC
ISBN: N/A
ISSN: ISSN-0036-6811
EISSN: N/A
"F = BIL" Revisited
Leadstone, Stuart
School Science Review, v93 n344 p99-104 Mar 2012
This article discusses improvements to two "classic" demonstrations of the interaction force between a magnet and a current-carrying conductor, which it is hoped will both interest and delight readers. Creating new demonstrations of fundamental phenomena in physics is the most rewarding activity for the keen demonstrator. A close second is the improvement or embellishment of a well-known demonstration, as Geoff Auty's recent article exemplifies (Auty, 2010), and this article is offered in the same spirit. The force "F" on a straight conductor of length "L" situated at right angles to a uniform magnetic field of flux density "B" and carrying a current "I" is given by "F = BIL". If the field is non-uniform then the force is still easily demonstrated but its magnitude cannot be calculated by using the simple expression. How to proceed in this case is the subject of the author's second example but first he deals with an "embellishment" of a convincing demonstration that the "BIL" force exists. (Contains 1 box, 2 tables, and 9 figures.)
Association for Science Education. College Lane Hatfield, Herts, AL10 9AA, UK. Tel: +44-1-707-283000; Fax: +44-1-707-266532; e-mail: info@ase.org.uk; Web site: http://www.ase.org.uk
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A