Follow us at: https://twitter.com/TutorVista
Check us out at http://www.tutorvista.com/content/physics/physics-iv/electromagnetic-induction/eddy-currents.php
What is Eddy Current
Eddy currents are currents induced in conductors to oppose the change in flux that generated them.[citation needed] It is caused when a conductor is exposed to a changing magnetic field due to relative motion of the field source and conductor; or due to variations of the field with time. This can cause a circulating flow of electrons, or a current, within the body of the conductor. These circulating eddies of current create induced magnetic fields that oppose the change of the original magnetic field due to Lenz's law, causing repulsive or drag forces between the conductor and the magnet. The stronger the applied magnetic field, or the greater the electrical conductivity of the conductor, or the faster the field that the conductor is exposed to changes, then the greater the currents that are developed and the greater the opposing field.
The term eddy current comes from analogous currents seen in water when dragging an oar breadthwise: localised areas of turbulence known as eddies give rise to persistent vortices.
Eddy currents, like all electric currents, generate heat as well as electromagnetic forces. The heat can be harnessed for induction heating. The electromagnetic forces can be used for levitation, creating movement, or to give a strong braking effect. Eddy currents can often be minimised with thin plates, by lamination of conductors or other details of conductor shape.
Please like our facebook page
http://www.facebook.com/tutorvista
Video Rating: / 5
Starter replacement here : http://youtu.be/N0lK3eUflh0
If the starter doesn't crank when you turn the ignition key, the possible causes are:
- the ignition switch
- the start relay (if present)
- the continuity of the electrical circuit
- the starter itself
One of the method in car troubleshooting is to proceed by elimination. This video shows how to test the ignition switch in order to eliminate this cause of failure.
Troubleshooting breakdown car starter engine doesn't start doesn't crank nothing happens starter motor
Auto, automobile, car, vehicle maintenance tools parts accessories engine mechanics do-it-yourself diy tutorial tuto
This video does not constitute or replace a real specialized technical manual, and was only made for convenience and educational purposes. "TutoBuild Eng" makes no warranties of any kind and accepts no liability. "TutoBuild Eng" cannot be held responsible for any damage caused to devices or persons using information contained in this video. The use of the information contained in this video is at your own risk.
Video Rating: / 5
Comments