How the solenoid gets the linear motion when the current is passed in the coil?

[Raj]

The Solenoids which are used for pneumatic controller uses the solenoid as a switch to control the value opening and closing. This is done by passing current to through the coil which produces the magnetic field . But i would like to know how the generated magnetic field will move the solenoid rod?

 

[zoki85]

When the coil is energized, a magnetic field is created. This field produces a force that acts on the ferromagnetic rod and moves it into the coil up to a certain allowed point. If the rod is a permanent magnet reversing the current direction in the coil reverses poles of the electromagnet and produced force can be in oposite direction to push out the rod.

 

[Raj]

Is it based on Flemings Left hand rule ?

 

[zoki85]

Right hand rule of a screw thread. I think that's the name