It is also grade school science to show that neither an electromagnet nor a permanent magnet will pick up nonferrous items like copper or aluminum. While technically not an electromagnet ...

It’s an electromagnet pendulum analog circuit. Whether you’re building it, or just studying the schematics, this is a fun way to brush up on the non-digital side of the craft. The pendulum is ...

Electromagnets have some advantages over permanent magnets. For example: they can be turned on and off the strength of the magnetic field can be varied These properties make electromagnets useful ...