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 ...

How a Generator Works When an electric current flows through a wire, it generates a three-dimensional magnetic force field around the wire, similar to that surrounding a bar magnet. Magnets are ...

They sense weak magnetic fields via gaseous forms of alkali metals, such as rubidium or caesium. Within the devices these atoms behave like tiny magnets and are aligned with a beam of laser light ...