Why is back emf strongest at the center of a conductor
Answers
Explanation:
The charge carriers constituting that current, usually electrons, are driven by an electric field due to the source of electrical energy. ... 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.
Answer:
The resistivity of the conductor is the same at the center as at the surface. The current is greater at the surface because the electrons at the surface feel a stronger electric field than electrons deeper inside the wire. The reason is that the electric field has a hard time penetrating very far into a conductor. Deep inside a conductor with a well developed skin effect, there is no EMF either forward or backward. It is as if the electrons deep in the conductor were surrounded with a Faraday cage.