The iron core increases the solenoid’s magnetic field strength. A simple electromagnet is made by coiling wire around an iron nail. Electromagnets are used in devices such as electric bells, and ...

In a superconducting electromagnet, such as in an MRI, superconducting wire is coiled around a core to produce magnetic fields of up to 30 tesla (600,000-times as powerful as the earth’s).

This article was originally published with the title “ Powerful Electromagnet for the Use of Oculists ” in Scientific American Magazine Vol. 105 No. 26 (December 1911), p. 573 doi:10.1038 ...

The device sure looks like an electromagnet made with magnet wire and a steel core. But when he shows the ends of the core, you’ll see that the side that attracts aluminum has a copper ring ...

It won’t turn you into Tony Stark—or Robert Downey Jr—but it will power the electromagnet in your heart, protecting you from all that shrapnel. Just eight bucks, but check Matt’s video on it.

As the pendulum’s magnet accelerates towards the electromagnet’s core, the Hall effect sensor registers an increase in voltage. The voltage peaks as the pendulum passes overhead, ...

An Electromagnet Makes This Iron Man Fly, ... From the right angle you’d swear Iron Man was flying over a city at night, but in reality it’s just a few millimeters above your desk.