Uppgifter om elektriska kretsar : Testar svenska fysiklärare rätt typ av kunskaper?

Sammanfattning: The purpose of this physics didactics work is to contribute to an increased knowledge of learning about electrical circuits. This is done partly through a literature studyof students’ difficulties, but also through an examination of test items on electrical circuits used in the Swedish upper secondary school. In addition to the study, a side project in the form of a translation from English to Swedish of a diagnostic test of understanding of electrical circuits, DIRECT, was carried out. Analyzing the test items on electrical circuits, 18 different categories were developed based on the collected material. The most common type of item was an item about power which also had a connection to reality. Each category was discussed in relation to the theoretical background and some items of additional interest were analyzed in more detail. Several conclusions were made based on this project, for example that a significant part of the items do not require understanding for the question but can be solved by mechanical use of formulas. In line with the research presented a considerable part of the items are dedicated to current on a conceptual level. Another conclusion was that items dealing with shorts and changes in a circuit would have been a welcome addition to the test items.