Answer Posted / raj

Generally the conductors are composite in nature, means it
is made by multiple coil twist one onother.When alternating
current, passes through the conductor then more fluxes cut
by the inner coil than the outer.So, the inductance
(L=Nxflux linkage/i) of the inner conductor will be more
and also reactace(X=wL) will be more.For that reson less
current will flow innersurface of the conductor than
outer.That is call skin effect.

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