For instance, magnetic field stimulation ... The method uses a tiny, 3.5 mm coil — just half the size of a pinky nail — placed on the brain’s surface to stimulate specific areas.

Other non-contact brain stimulation methods use magnetic fields ... brain by placing an ultra-small coil (3.5 mm), approximately half the size of a pinkie nail, on the brain's surface.

Transform your manicure with cat eye nails, the magnetic polish trend. Get expert tips on how to DIY them and creative ideas ...

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 makes a temporary electromagnet. It loses its ...

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.