In this article we describe two simple experiments using an ion accelerator as an aid to the teaching of electromagnetism to high-school students. This is part of a programme developed by a Brazilian State funding agency (FAPERJ) which aims to help scientifically minded students take their first steps in research.

Discusses three experiments, respectively, relating to electricity, optics, and electronics, which provide both the experienced and weaker students with a high interest in determining unknowns from a limited amount of information. (CC)