Demonstration experiments in electrostatics: low cost devices

Abstract

The main purpose of this paper is to provide a set of demonstration experiments in electrostatics. Emphasis is put in regard to the making of apparatuses in order to have useful self-made devices from common materials; obviously some apparatuses need special mechanical skill as a turning operation. All devices are designed in order to have a set of portable experiments. Keywords: demonstration experiments, electrostatics, home-made devices.O objetivo principal deste trabalhoé propiciar um conjunto de experimentos demonstrativos em eletrostática. Aênfase de sua montagemé a busca pois aparelhos que possam ser produzidos de materiais comuns e pelo próprio experimentados. Alguns aparelhos requerem algum conhecimento mecânico em seu ajuste e todos são projetados de modo a serem portáteis. Palavras-chave: experimentos de demonstração; eletrostática; equipamentos caseiros.

Low cost device to study static electricity and to verify the polarity of the charge on the surface of the materials in the triboelectric series

“…It has four independent 2 input NAND gates to perform the logical NAND operation. This IC is low cost and a good alternative for MC14081 [4]. It requires a supply voltage between 2 V and 7 V. Therefore, we have used a lithium ion coin cell (CR2032), which provides a constant supply of 3 V.…”

“…The list of such materials is called the triboelectric series. In some recent studies, the polarity of the charge of the triboelectric materials was detected using p-channel and n-channel MOSFETs [1], an indicator connected with bipolar transistors [2,3], or using an AND gate interfaced with an LED [4].…”