hassam
Solenoid
December 25th 2008 20:56
A solenoid refers to a coil shaped metallic wire which is wound tightly around a central core. Solenoids are one of the most important and breakthrough creations in the field of Electromagnetism. The solenoid has a lot of application due to it's unique properties.
When current is passed through such coil a magnetic field is developed, which is concentrated in the center of the solenoid and as we move away from the center the magnetic field starts to weaken.
For an ideal case we take vaccum as the as the central core of the solenoid but in practical application a core of iron is used which actually greatly enhances the magnetic field of the solenoid. Once current is passed through such a solenoid it produces a very powerful magnetic field.
The magnetic field of a solenoid directly depends on the number of turns of the solenoid and the length of the wire out of which the coil has been made. It means the magnetic field can be strengthened by using a long wire having large number of turns, wound around an iron core.
Solenoids are extensively used in automobiles as starters and in Hydraulics machinery to control the flow of oil to different parts. The relay, that we use in so many things also has a solenoid in it.
| 47 |
| Vote |
Add To: 
