While technically not an electromagnet ... you’ll see that the side that attracts aluminum has a copper ring embedded in it. The coil is fed with AC. The magnetic field from the coil induces ...

So, a copper coil that is used for either inductance, resistance or sometimes to move things, which is the electromagnetic properties of coils. So, it’s basically an old sub-supplier to IBM ...

A coil with an iron core is called an electromagnet. The iron core increases the coil’s magnetic field strength. A simple electromagnet is made by coiling wire around an iron nail. An iron core ...