Literaturnachweis - Detailanzeige
| Autor/in | Madsen, M. J. |
|---|---|
| Titel | Ohm's law for a wire in contact with a thermal reservoir. |
| Quelle | In: American journal of physics, 77 (2009) 6, S. 516-519
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | online; gedruckt; Zeitschriftenaufsatz |
| ISSN | 0002-9505; 1943-2909 |
| DOI | 10.1119/1.3097778 |
| Schlagwörter | Ohmsches Gesetz; Physik; Temperatur; Widerstand (Phys); Wärmeleitung |
| Abstract | Ohm's law is one of the key empirical relations taught in introductory courses on electricity. Students often do a straightforward experiment to measure the current through a resistor as a function of voltage. These experiments typically yield a linear relation between the current and the voltage using carbon film resistors. However, the same measurements on long lengths of conducting wire (such as common wire resistivity kits) typically have a clear nonlinear component. The nonlinear behavior can be modeled using simple principles of heat transfer with a thermal reservoir. Experimental results are shown to agree well with this simple model. © 2009 American Association of Physics Teachers. |
| Erfasst von | Arbeitsgruppe Didaktik der Physik, Universität Osnabrück |
| Update | 2009/3 |
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