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ERIC Number: EJ936659
Record Type: Journal
Publication Date: 2011-Jan
Pages: 3
Abstractor: ERIC
Reference Count: 6
ISBN: N/A
ISSN: ISSN-0031-9120
Verifying Magnetic Force on a Conductor
Ganci, Salvatore
Physics Education, v46 n1 p14-16 Jan 2011
The laboratory measurement of the magnetic force acting on a straight wire of length "l" carrying a current of intensity "i" in a magnetic field "B" is usually made using current balances, which are offered by various physics apparatus suppliers' catalogues. These balances require an adequate magnet and commonly allow only the measurement of the force when the straight wire is orthogonal to the magnetic field. The availability of low-cost pocket electronic balances with a resolution of 0.01 g and a range of 0-100 g allows verification of the law f = i l x B, where f is the force acting on the straight wire of length "l" carrying a conventional current having intensity "i" and "B" is the so-called magnetic induction vector. In this article, the author describes an experiment verifying the equation (including the angle dependence) using a pocket electronic balance and a low-cost dc power supply giving 6 A maximum current. (Contains 2 tables and 4 figures.)
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://journals.iop.org
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A