Contactors are nothing more than a coil and a set of contacts. The coil of the contactor can be 24, 115, or 230 V, and even higher depending on the application. The contactor arrangement can be single ...

Using a diamond needle tipped with a single electron, physicists have found seemingly impossible one-sided magnets swirling along the surface of hematite. The rules of physics (the ones we know of, ...

Somewhere lurking in the universe, most physicists agree, are minuscule magnets with just one pole — a north or a south, but not both. Scientists haven’t spotted any yet, but a new experiment offers ...