The Czech Conceptual test from the area of Electricity and Magnetism was prepared at Department of Physics Education, Faculty of Mathematics and Physics, Charles University in Prague. First part of the paper presents three problematic topics which were identified using this test - charge distribution on an insulators, Coulomb's law and electromagnetic induction.
However, to identify misconceptions is not enough. Therefore, the main part of the paper presents some experiments which can help students to overcome their misconceptions and to better understand not only the topics mentioned above.
Most of these experiments can be done with very simple tools and materials.