solenoid (redirected from Solenoid coil)

solenoid (sō`lənoid'), device made of a long wire that has been wound many times into a tightly packed coil; it has the shape of a long cylinder. If current is sent through a solenoid made of insulated wire and having a length much greater than its diameter, a uniform magnetic field will be created inside the solenoid. This field can be intensified by inserting a ferromagnetic core into the solenoid. See electromagnet; magnetism.

---

solenoid

A mechanical switch that is activated by a magnetic coil. It is used to open and close an electric circuit, open or close a valve in a fluid pipe or cause some mechanical action to be triggered.

---

solenoid

1. a coil of wire, usually cylindrical, in which a magnetic field is set up by passing a current through it

2. a coil of wire, partially surrounding an iron core, that is made to move inside the coil by the magnetic field set up by a current: used to convert electrical to mechanical energy, as in the operation of a switch

3. such a device used as a relay, as in a motor vehicle for connecting the battery directly to the starter motor when activated by the ignition switch

---

solenoid [′säl·ə‚nȯid]

(electromagnetism)

Also known as electric solenoid.

An electrically energized coil of insulated wire which produces a magnetic field within the coil.

In particular, a coil that surrounds a movable iron core which is pulled to a central position with respect to the coil when the coil is energized by sending current through it.

(meteorology)

meteorological solenoid