Solenoid: A cylindrical coil of wire acting as a magnet when carrying electric current.
A solenoid works by creating a magnetic field which attracts or repels a metal rod. The electromagnetic field allows the rod to retract or extend depending on how much, how frequently, and under what circumstances, you choose to send voltage out.
Solenoids can be used in automatic locking mechanisms, and are sometimes used in dialysis machines. They can also be used in the railway industry; “Anywhere that electrical power is required to achieve a movement becomes an application for a solenoid. Some general examples of use are locking, cutting, clamping, punching, positioning, diverting, holding or rotating.” (http://www.thesolenoidcompany.com/applications)
Continue reading Solenoid