20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

Measurement of Triboelectric Charges by Using Faraday's Cage and Darlington Transistor Circuit

20 May 2015, 15:15
15m
White Lotus ()

White Lotus

Oral presentation Physics Education Physics Education (APRU)

Speaker

Ms Chitchanok Lesak (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Physics Education Research Laboratory, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand)

Description

When two objects made from different materials are rubbed and immediately separated, negative charges or electrons are then transferred from a surface of one object to another one, depending on material of each object. The charge transfer process due to rubbing is called “triboelectrification.” This study aimed to measure transferred triboelectric charges by using two methods. The first method is to measure the triboelectric charges using Faraday’s cage and Vernier charge sensor. The second method is to use the Darlington transistor circuit consisting of two transistors to amplify current induced by electric field of triboelectric charges. The measured values of triboelectric charges from both methods are compared.

Primary author

Ms Chitchanok Lesak (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Physics Education Research Laboratory, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand)

Co-author

Prof. Pornrat Wattanakasiwich (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Physics Education Research Laboratory, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand)

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