From 1775 to 1826 Ohm’s Law was gradually approached through the investigations of many researchers, stating with Cavendish. This article discusses the main experiments and the evolution of the underlying ideas, among which the concept of internal resistance of electrical generators eventually proved itself essential to Ohm’s discovery. […]
In the research shown in this article the speed of the light in the air was determined by two different methods and by the use of the instruments provided by Leybold for both the experiments. In both the experiments we indirectly measured the time taken by a light beam to cover fixed distance. […]
The experimental comparison of an electric heater based on the Joule effect with a Peltier effect heat pump shows that the second device is the most effective of the two. […]
The article reports the results of an investigation on the knowledge of physics related to common sense patterns of knowledge of Italian students in the first year of University. The results were communicated both to the students and to the teachers of the courses. […]