- 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.
- Dvořák L., Kácovský P.: More Ideas from Malá Hraštice (Easy Experiments with Famous Names in the Background), Fair 23, České Budějovice 2018
The paper describes several experiments associated with the names of famous physicists: 1) ‘almost Rutherford’s’ experiment which deals with repulsion of macroscopic objects, 2) simple verification of the Ampère’s law of total current, 3) repelling magnets, when the poles of thin long magnets repel in analogy with the Coulomb's law, but with shorter magnets it’s more complicated and 4) the Oersted’s experiment.
- Kácovský P.: Electric circuits in the eyes of a thermographic camera, Fair 23, České Budějovice 2018
The paper describes three experiments that use thermographic camera for observations of heat effects in electric circuits. First experiment shows construction of a conductive maze, second experiment deals with different heat capacities of resistors of various sizes and third experiment is dedicated to temperature changes in very low frequency harmonic AC circuit.
- Mandíková D., Drozd Z.: Bits and pieces from an acoustic workshop, Fair 23, České Budějovice 2018
The paper presents selected experiments from the acoustic workshop. Description of an experiment includes detailed execution instructions and methodical notes.
- Reichl J., Dvořák J.: Ruben’s tube, Fair 23, České Budějovice 2018
The paper describes construction of a device that is suitable for demonstration of gas compressibility by acoustic waves, demonstration of standing waves, sound propagation in gas, … The device originated on basis of a gifted student Jakub Dvořák’s preparation for practical physics homework.
- Vícha V.: Mystery of Cape Agulhas, Fair 23, České Budějovice 2018
Which physics experiments yield different results on northern and southern hemisphere? The paper describes several experiments conducted (or observed) in Cape Town and surroundings that relate to Sun’s apparent movement, seasons of the year, behaviour of the compass and natural background radiation.