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ERIC Number: EJ930456
Record Type: Journal
Publication Date: 2010-Jul
Pages: 2
Abstractor: ERIC
Reference Count: 3
ISSN: ISSN-0031-9120
Successfully Mapping the U-Tank to an Electric Circuit
Hong, Seok-In
Physics Education, v45 n4 p322-323 Jul 2010
Water-flow analogies are helpful in understanding electricity. For example, in the Lodge model, the constant DC voltage source (a battery) is represented by a U-tank with two water columns of the same cross-sectional area connected by a horizontal duct in which a pump is installed. The pump maintains the difference of the levels of the two water columns, which corresponds to the constant emf of a battery. In this article, the author discusses how to successfully map the U-tank to an electric circuit. This work will be beneficial to instructors who teach electricity because they can recognize the validity and the limitation of the liquid-flow analogy (that is, to which electric circuit the U-tank system is mapped successfully or not). It can be useful in forming a basis of analogy-based learning. (Contains 1 figure.)
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:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A