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ERIC Number: EJ1003248
Record Type: Journal
Publication Date: 2012-Nov
Pages: 6
Abstractor: As Provided
Reference Count: 3
ISSN: ISSN-0031-9120
Hand-Drawn Resistors and a Simple Tester Using a Light-Emitting Diode
Kamata, Masahiro; Abe, Mayumi
Physics Education, v47 n6 p741-746 Nov 2012
A thick line drawn on a sheet of paper with a 6B pencil is electrically conductive and its resistance can be roughly estimated using a simple tester made of a light-emitting diode (LED) and a lithium coin-type cell. Using this hand-drawn resistor and the LED tester, we developed teaching materials that help students to understand how electrical resistance varies according to (a) the length of resistant lines, (b) the width of resistant lines, (c) the number of resistant lines and (d) the type of connection between resistant lines. (Contains 2 tables and 8 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:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Junior High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A