ERIC Number: EJ1049034
Record Type: Journal
Publication Date: 2015-Jan
Abstractor: As Provided
Reference Count: 1
A Nontoxic Barlow's Wheel
Daffron, John A.; Greenslade, Thomas B., Jr.
Physics Teacher, v53 n1 p42-43 Jan 2015
Barlow's wheel has been a favorite demonstration since its invention by Peter Barlow (1776-1862) in 1822. In the form shown in Fig. 1, it represents the first electric motor. The interaction between the electric current passing from the axle of the wheel to the rim and the magnetic field produced by the U-magnet produces a torque that turns the wheel. The original device used mercury to provide electrical contact to the rim, and the dangers involved with the use of this heavy metal have caused the apparatus to disappear from the lecture hall.
Descriptors: Science Instruction, Energy, Scientific Concepts, Magnets, Motion, Physics, Metallurgy, Demonstrations (Educational)
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: email@example.com; Web site: http://scitation.aip.org/tpt
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A