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.
An educational Kohlrausch ammeter / S Straulino;A Cartacci. - In: PHYSICS EDUCATION. - ISSN 0031-9120. - STAMPA. - 45:(2010), pp. 158-161. [10.1088/0031-9120/45/2/005]
An educational Kohlrausch ammeter
STRAULINO, SAMUELE;CARTACCI, ANNA MARIA
2010
Abstract
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.
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