It’s an electromagnet pendulum analog circuit ... with electromagnets so they can move on to the next logical steps: coil guns and web shooters.

The key interaction is between a permanent magnet mounted to the end of the waving arm/pendulum and a many-turn wire coil attached to the body. As the magnet swings over the coil, its movement ...

THE electromagnet designed for the use of oculists ... and its dimensions must bear the proper reIation to those of the coil. The first condition is very important. The small electromagnets ...

Coiling the wire around an iron core increases the strength of the electromagnet by concentrating the magnetic field. In this activity campers coil wire around an iron nail and run current through ...

Connect one end of the coil to one terminal of the knife switch ... The mechanical energy is caused by the attractive force of the electromagnet. Now imagine a circle of electromagnets that ...

A coil of wire, or solenoid, consists of a wire coiled up into a spiral shape. When an electric current flows, the shape of the magnetic field is very similar to the field of a bar magnet.

But this electromagnet is still quite weak, see? It’s only holding onto one of our paperclips. But if I coil the wire more times around the iron then I am wrapping the same electric current ...