Origin of solenoidFrench solénoïde from Classical Greek s?l?n, a tube, channel ( from Indo-European an unverified form tul- from base an unverified form tw?- from source Sanskrit t??a, a quiver) + eidos, -oid
An example of a solenoid is the part of a car's starting system that transfers the electric current from the ignition to the motor.
- A current-carrying coil of wire that acts like a magnet when a current passes through it.
- An assembly used as a switch, consisting of a coil and a metal core free to slide along the coil axis under the influence of the magnetic field.
Origin of solenoidFrench solénoïde from Greek sōlēnoeidēs pipe-shaped sōlēn pipe -oeidēs -oid
solenoid - Computer Definition
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.
- The solenoid was above the iron cylinder, the supporting rod of which passed through it as a core.
- Ampere had already previously shown that a spiral conductor or solenoid when traversed by an electric current possesses magnetic polarity, and that two such solenoids act upon one another when traversed by electric currents as if they were magnets.
- At once the attractive force of the solenoid on the iron cylinder was automatically reduced, and the falling of the latter caused the negative carbon to rise, starting an arc between it and the metal in the crucible.
- Any change in the resistance of the arc, either by lengthening, due to the sinking of the charge in the crucible, or by the burning of the carbon, affected the proportion of current flowing in the two shunt circuits, and so altered the position of the iron cylinder in the solenoid that the length of arc was, within limits, automatically regulated.
- In the second, or " braking off " method, the brake is automatically applied by a spring or weight, and is released either mechanically or, in the case of electric cranes, by the pull of a solenoid or magnet which is energized by the current passing through the motor.