Instead of using an electrode, Saha and her team turned to magnetic coils of wire. Over two centuries ago, physicist Michael Faraday described how electric current running through a coil of wire ...

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.

New-generation motors and coils are designed to be smaller, lighter, and more efficient, reducing the space available for wire windings. As a result, aluminum magnet wires, which take up more ...

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 ...