- Boček V.: Electricity from Tuna and Other Non-Traditional Sources, Fair 21, Brno 2016
The paper describes three non-traditional ways of "producing" electricity. First, we use food and Peltier’s cell to power an engine. Second, we light up a LED by a piezo-loudspeaker. As a third, we focus on the board near which a LED lights up due to electromagnetic induction.
- Boček V.: Magnets and Inductors with Current, Fair 23, České Budějovice 2018
The forces affecting a magnet placed in the magnetic field of the coil, the so-called electromagnetic pendulum, are investigated in this paper. By consecutive turning on and off of the current flowing through the coil, we will look for the resonant frequency of the pendulum.
- Jakubičková J., Klinovská L.: Other ideas from Malá Hraštice: magnets’ repulsion, Fair 24, Hradec Králové 2019
The paper describes in detail the manufacturing process of making a speaker. In the second part, the possibilities of incorporating the speaker activity into the classroom are proposed.
- Koudelková V., Dvořák L.: Three experiments inspired by secondary school students’ misconceptions about electricity and magnetism, Fair 18, Hradec Králové 2013
The contribution describes three experiments which were inspired by the very frequent secondary school students’ misconceptions about electricity and magnetism. The first experiment relates to a charge on an insulator, the second one demonstrates qualitatively Coulomb’s law and the third experiment illustrates behaviour of a coil in a homogeneous magnetic field. The misconceptions are described as well as are the results of research that demonstrate a relevant misconception for each experiment respectively.
- Piskač V.: Three new experiments, Fair 12, Praha 2007
The first part of this contribution is a demonstrative experiment –a light bulb rheostat changes a current in a circuit. The second part deals with acoustic devices (Seebeck siren and monochord), demonstrated by electromagnetic detectors.