Electrets produce a semi-permanent static electric field, similar to how a magnet produces a magnetic field ... He built a simple electric field detector, which is just a battery, LED and FET ...

It’s something [mircemk] demonstrates, with an Arduino-powered magnetic field strength meter that uses a UGN 3503U Hall effect device. The circuit is extremely simple, comprising the sensor ...

The Kenyan group analyzed the performance of a multicrystalline solar panel influenced by a static magnetic field they calculated was the equivalent of the ‘geomagnetic field’ which protects ...

Instead of applying the responses of materials to an external electric field, it links the static (DC) and dynamic (AC) responses of a material following its interaction with magnetic fields.