Abstract
Qualitative experiments such as visualizing magnetostatic fields with iron filings are often carried out in primary and secondary school, while quantitative evaluations of permanent magnetic fields are often left aside. This also applies to most lectures at university despite the fact that the topic would fit quite well into a lecture on electrodynamics. Gaining a quantitative picture of permanent magnetic fields is a rather difficult task. Calculating such fields often requires numerical methods and measuring them a very sensitive apparatus. However, as magnetic fields are invisible, properties of these fields have to be determined in order to visualize them quantitatively. A remote laboratory was developed to be used in teaching at the Ludwig-Maximilians-Universität München. It combines exact measurements and theoretical predictions for the field of a cylindrical permanent magnet. Furthermore, multiple representations of the measurements and possibilities of analysis are offered. The laboratory is accessible via https://www.didaktik.physik.uni-muenchen.de/sims/magneticfield/.
Highlights
A remote laboratory was developed to be used in teaching at the Ludwig-MaximiliansUniversität München
This is quite surprising if you take into account that the students know the effects of magnetic fields since pre-school age, as many toys rely on magnetism
The graph shows that this approximation gives quite good results for the permanent magnet of the remote lab (R = 7.5 mm, L = 100 mm). Permanent magnets and their fields are the content of courses in primary school, secondary school and university
Summary
Teaching conceptual knowledge about electricity and magnetism and the improvement of teaching in this field are laborious tasks (Maloney et al 2001, Planinic 2006, Pollock 2009).
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