ERIC Number: EJ912893
Record Type: Journal
Publication Date: 2010-Nov
Pages: 4
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0031-921X
EISSN: N/A
Magnetostatics Analysis, Design, and Construction of a Loudspeaker
Galeriu, Calin
Physics Teacher, v48 n8 p537-540 Nov 2010
Making a loudspeaker is a very rewarding hands-on activity that can be used to teach about electro-magnetism and sound waves. Several loudspeaker designs have been described in this magazine. The simplest loudspeaker has only a magnet, a coil, and three plastic cups. The simpler devices require a powerful amplified output, e.g., from a boom box. The more complex devices can operate using the smaller electric current from a CD player earphone output. Unfortunately, the procedure to make a more efficient loudspeaker is lengthy and less recommended to some high school students, involving a hot glue gun, a safety razor, five-minute epoxy, etc. Our loudspeaker, a variation of Heller's, is both simple in construction and efficient in operation. An analysis of the magnetic field distribution helped us in the design of this loudspeaker.
Descriptors: High School Students, Science Education, Science Instruction, Physics, Science Activities, Hands on Science, Science Teachers
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://scitation.aip.org/tpt
Publication Type: Journal Articles; Reports - Descriptive
Education Level: High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A