Voltage and Surface Charges

  • Hermann Haertel University Kiel

Abstract

The abstract definition of electric power as "ability of a voltage source to do work“ or quantitatively as "energy per unit charge" is preceded by a qualitative description in terms of the existence of surface charges. These surface charges and the associated electric fields can be demonstrated experimentally and allow a causal explanation of the processes and laws to be understood and learned.

References

Assis, A. / Hernandes, J. (2007) The Electric Force of a Current; Apeiron Montreal, available under: http://www.ifi.unicamp.br/~assis/The-Electric-Force-of-a-Current.pdf.
Chabay, R. / Sherwood, B. (2002) Matter and Interaction, Volume II: Electric & Magnetic Interaction, John Wiley.
Author, H. (1979) Zur Einführung des Spannungsbegriffs in der Sek. I.
In: Author, H. (Hrsg.): Zur Didaktik der Physik und Chemie, Hannover: Schroedel, S. 154-156.
Author, H. (1981) IPN-Teaching Unit „The Electric Circuit as a Sytem“ for grade 7 and 8 (1981). (Updated and shortened version (in German) available under
http://www.astrophysik.uni-kiel.de/~hhaertel/PUB/UE-7.pdf).
Author, H. (1985) The electric voltage: What do students understand? What can be done to help for a better understanding? In: Duit, R. (ed.); Jung, W. (ed.): Rhöneck, C. von (ed.): Aspects of Understanding Electricity. Proceedings of an International Workshop. IPN-Arbeitsberichte 59. Kiel: IPN, 353-362.
Author, H. (2005) Test about Voltage - A Basic Term in Electricity Results.
http://www.astrophysik.uni-kiel.de/~hhaertel/Spannung/voltage_test_result.pdf.
Jefimenko, O. (1982) AJ Phys .30, S.19/21.
Marcus, A. (1941) The electric field associated with a steady current in a long cylindrical conductor, American Journal of Physics, 9, 225-226.
Rosser, W.G.V. (1963) What makes an electric current flow, American Journal of Physics, 31, 884-885.
Schwedes, H. / Dudeck, W.-G. / Seibel, C. (1995) Elektrizitätslehre mit Wassermodellen, Praxis der Naturwissenschaften - Physik, 44, S. 28-36.
Sommerfeld, A. (1964) Electrodynamics. Academic Press, New York
Walz, A. (1979) E-Felder um stationäre Ströme; PU 2-1984, 5S. 61-68.
Published
2021-08-24
How to Cite
HAERTEL, Hermann. Voltage and Surface Charges. European Journal of Physics Education, [S.l.], v. 12, n. 3, p. 19-31, aug. 2021. ISSN 1309-7202. Available at: <http://eu-journal.org/index.php/EJPE/article/view/317>. Date accessed: 18 sep. 2021. doi: https://doi.org/10.20308/ejpe.v12i3.317.