Solenoid

A solenoid is a loop of wire, often wrapped around a metallic core, which produces a magnetic field through electromagnetic induction when an electrical current is passed through it. Solenoids are important because they can create controlled magnetic fields and can be used as electromagnets.

Electromechanical solenoids

Electromechanical solenoids consist of an electromagnetically inductive coil wound around a movable steel or iron slug. The coil is shaped such that the slug can be moved in and out of the center, altering the coil's inductance and thereby becoming an electromagnet. The force applied to the slug is proportional to the change in inductance of the coil with respect to the change in position of the slug, and the current flowing through the coil. The force applied to the slug will always move the slug in a direction that increases the coil's inductance.

Related Topics:
Steel - Iron - Inductance

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