A permanently electrified substance or body that has opposite charges at its extremities. They resemble permanent magnets in many ways. An electret can be made by cooling certain waxes in a strong electric field.
Chemistry
A permanently electrified substance or body that has opposite charges at its extremities. Electrets resemble permanent magnets in many ways. An electret can be made by cooling certain waxes in a strong electric field.
Electronics and Electrical Engineering
A substance that is permanently electrified and has oppositely charged extremities: it is the electrical analogue of a permanent magnet. Electrets have been used in electrometers and in capacitor microphones.