You may have heard warnings about keeping magnets close to electronic devices. These were especially common in the 80s and ...

These new iron-nitride magnets are stronger, cleaner to make, and made from domestic iron-salt waste and nitrogen. These new ...

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 ...

As the number of turns increases the number of paper clips held increase. This means that the strength of the magnet increases with increasing number of turns in the coil. Once again, since the ...

To investigate, describe and recall how the strength of the magnetic field depends on the current in the coil, the number of turns in the coil and the material used as the core of the coil.