The strength of the magnetic field around a wire is greatest closest to it. Fleming's left hand rule shows that changing the direction of the current in a straight wire or a solenoid reverses the ...

Pictures may enliven us, but other data, such as information about magnetic fields, add a huge amount to our understanding of ...

To investigate, describe and recall how the strength of the magnetic ... by the current flowing in the wire. The bigger the current the stronger the magnetic field and hence the stronger the ...

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 ...

Merging some esoteric physics principles with an advanced instrument creates a magnetic microscope with resolution better ...