Electrets and electrostatic measurement
作者:
R. N. Varney,
H. T. Hahn,
期刊:
American Journal of Physics
(AIP Available online 1975)
卷期:
Volume 43,
issue 6
页码: 509-513
ISSN:0002-9505
年代: 1975
DOI:10.1119/1.9780
出版商: American Association of Physics Teachers
数据来源: AIP
摘要:
Electrets, the electrical counterparts of magnets, have been known for a full 50 years but have not found their way into undergraduate physics. In simplest form, they are polarized dielectrics that are permanent on a scale of months. Procedures are described for making electrets out of plastic sheets like Mylar, for testing them and measuring their pole strength, and for establishing necessary and sufficient demonstrations that they are not simply surface charged.
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