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.

it stores energy in the magnetic field when current flows through the coil. When disabling the solenoid, any circuitry used to drive the solenoid must never abruptly stop the flow of current, because ...

Solenoids are all over our homes and cars, helping us perform all manner of important tasks. How do solenoids work, and where ...