Electroscope - a simple indicator device for determining electric charge. It is very easy to make at home with your own hands. To do this we need a piece of foil and a jar with a plastic lid.
For better stability, a cocktail straw and a plastic ball are wrapped inside the foil.
Please note that for weight, there are small twists at the ends of the diverging plates; they can be used to adjust the sensitivity of our electroscope.
