An educational Kohlrausch ammeter

The Kohlrausch ammeter is based on the measurement of the force acting between a solenoid and a soft iron rod inserted inside it. In this article, we present a new version of the instrument for educational purposes: in our device the dynamometer, which is usually employed to measure the force, is re...

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Bibliographic Details
Published in:Physics education 2010-03, Vol.45 (2), p.158-161, Article 158
Main Authors: Straulino, S, Cartacci, A
Format: Article
Language:English
Subjects:
Ammeters
Education
Equations (Mathematics)
Force measurement
Magnets
Measurement Equipment
Physics
Science Instruction
Scientific Concepts
Scientific Principles
Teaching Methods
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Description
Summary:The Kohlrausch ammeter is based on the measurement of the force acting between a solenoid and a soft iron rod inserted inside it. In this article, we present a new version of the instrument for educational purposes: in our device the dynamometer, which is usually employed to measure the force, is replaced by an electronic balance. The operation of the instrument is satisfactory: the precision is better than 1%. Furthermore, the measurements can be useful to improve students' knowledge of magnetism and magnetic materials. (Contains 5 figures, 4 footnotes, and 1 table.)
ISSN:0031-9120
1361-6552
DOI:10.1088/0031-9120/45/2/005