Electrets produce a semi-permanent static electric field, similar to how a magnet produces a magnetic field. The ones in microphones are very small, but in the video after the break [Jay Bowles ...

Electrets produce a semi-permanent static electric field, similar to how a magnet produces a magnetic field. The ones in microphones are very small, but in the video after the break [Jay Bowles ...

Experiments suggest an unusual magnetic material could help harness energy from Earth’s rotation. But not everyone is ...

Hummingbird flower mites seem to rely on static electricity to do the job ... so of course, even little electric fields are important for them. This could help explain the mystery of how they ...

charging by friction and electric fields. If you struggled with the quiz, don't panic - we've got you! You can revise static electricity by clicking the links below. Click the links below to try ...

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.