Meaning of skin effect :
When alternating current flows through conductor it has tendency to flow away from center of conductor. i.e. maximum current density is near skin of conductor and goes on reducing towards centre core is known as skin effect.( Since the inductive reactance (XL) at the centre of the conductor is more than surface of conductor)
OR
The tendency of alternating current to concentrate near the surface of a conductor is known as skin effect.
Skin effect can be minimized by:
1. Use stranded conductors instead of solid conductors.
2. Use hollow conductors instead of solid conductor.
3. Use ACSR /AAAC conductors for transmission purpose
4. Use D.C. supply whenever possible as Skin effect is absent (Since frequency 0) instead of A.C. supply.