- #1
Jackson Lee
- 77
- 1
Hey, guys. There is something interesting about the skin effect, which also made me curious. Could you please help to solve it?
The following is what I got from Wiki.
The following is what I got from Wiki.
It is said that, according to theory of induction, induced current would oppose the change of magnetic field. Then when current increases in the upward direction, the outward induced current would be formed. However, when current decreases in the upward direction (you know this is AC current), then it seems induced current would change into inward direction so as to maintain magnetic field. If it is the case, the "skin effect" would change into "core effect". However, why does this never come true?alternating current flowing through that conductor. The charge carriers constituting that current, usually electrons, are driven by an electric field due to the source of electrical energy. An alternating current in a conductor produces an alternating magnetic field in and around the conductor. When the intensity of current in a conductor changes, the magnetic field also changes. The change in the magnetic field, in turn, creates an electric field which opposes the change in current intensity. This opposing electric field is called “counter-electromotive force” (back EMF). The back EMF is strongest at the center of the conductor, and forces the conducting electrons to the outside of the conductor, as shown in the diagram on the right.[1]