Electrets
MAR 01, 1949
The electret, an electrical counterpart to a permanent magnet, theoretically isn’t supposed to exist. Yet the author made one which is still “alive” after twelve years. He discusses how electrets may be used and some of the problems in understanding them.
DOI: 10.1063/1.3066462
Electrets are the electrical equivalent of permanent magnets—they carry a permanent positive charge at one surface, and a permanent negative charge at the opposite surface. The most remarkable thing about them is that, theoretically, they cannot exist! Yet they do exist, posing a problem that has not yet been solved.
More about the Authors
Andrew Gemant. Detroit Edison Company.
© 1949. American Institute of Physics
