nähtus vahelduvvoolu puhul juhis, mille puhul voolutihedus on pinna lähedal suurem kui juhi sisemuses
for an alternating electric current in a conductor, phenomen in wich the current density is greater near the surface than in the interior of the conductor
Pinnaefekt suurendab juhi takistust ja vähendab induktiivsust elektrivoolu sagedusega ja esineb ka üldisemal juhul mis tahes ajas muutuva voolu korral.
The skin effect increases the resistance and decreases the inductance of a conductor with the frequency of the electric current. The skin effect occurs also in the more general case of any time-varying current.