Electrets produce a semi-permanent static electric field, similar to how a magnet produces a magnetic field ... [Jay] 3D printed a simple cylindrical mold and stuck aluminum foil to the outer ...

Using an XMC1100 microcontroller development board and a TLV49 3D magnetic sensor, the device is able to track the poles of a magnet in real-time and produce an approximation of what the field ...

A flower-shaped structure only a few micrometers in size made of a nickel-iron alloy can concentrate and locally enhance ...

At the heart of MRI technology is a large, usually cylindrical magnet, ranging in strength ... are a billionth the strength of the earth's magnetic field. “It is like hearing a needle dropping ...

Now Chyba and co have shown that such a conductor can extract electrical energy directly from Earth's rotation through its own magnetic field. Their experiment is relatively simple. It turns out that ...

This means that their magnetism is there all the time and cannot be turned on or off as it can with an electromagnet. Converting a magnet to a non-magnet is called demagnetisation. Magnets are ...