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ERIC Number: EJ901540
Record Type: Journal
Publication Date: 2010-Sep
Pages: 9
Abstractor: As Provided
Reference Count: 8
ISSN: ISSN-0143-0807
A Differential Magnetic Circuit for Teaching Purposes
Kraftmakher, Yaakov
European Journal of Physics, v31 n5 p1239-1247 Sep 2010
A differential magnetic circuit (magnetic bridge) is described. The circuit separates the magnetic field sensor and the sample under study. A Hall probe serves as the sensor. The signal from the sensor can be enhanced by concentrating the magnetic flux. The magnetic bridge works even with dc magnetic fields. The device is used for displaying hysteresis loops of ferromagnets and for observing the superconducting-to-normal phase transition in a high-temperature superconductor and the Curie point of a ferromagnet. The magnetic bridge seems to be useful for undergraduate laboratories in electricity and magnetism. (Contains 6 figures.)
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A